
    Geoffrey DUGGER, Petitioner, v. Mary Ann ARREDONDO, Individually and as Representative of the Estate of Joel Martinez, Deceased, Respondents.
    No. 11-0549.
    Supreme Court of Texas.
    Argued Nov. 6, 2012.
    Delivered Aug. 30, 2013.
    
      James C. Harrington, Texas Civil Rights Project, Austin, TX, for Amicus Curiae Texas Civil Rights Project.
    John K. Dunlap, Byrne, Cardenas & Aris, LLP, Dallas, TX, for Petitioner Geoffrey Dugger.
    Adam R. Hardison, Hardison Law Firm, Dallas, TX, for Respondents Mary Ann Arredondo.
   Justice GREEN

delivered the opinion of the Court,

in which Chief Justice JEFFERSON, Justice JOHNSON, Justice GUZMAN, Justice LEHRMANN, and Justice BOYD joined.

In this wrongful death suit, we consider the viability of the common law “unlawful acts doctrine” as an affirmative defense in light of Texas’s proportionate responsibility scheme and the statutory affirmative defense provided in section 93.001 of the Texas Civil Practice and Remedies Code. Under the unlawful acts doctrine, a plaintiff cannot recover damages if it can be shown that, at the time of injury, the plaintiff was engaged in an illegal act that contributed to the injury. See Gulf, C. & S.F. Ry. Co. v. Johnson, 71 Tex. 619, 9 S.W. 602, 603 (1888). The trial court rendered summary judgment for the defendant on his affirmative defense based on the unlawful acts doctrine. The court of appeals reversed, holding that section 93.001 superseded the unlawful acts doctrine. Arredondo v. Dugger, 347 S.W.3d 757, 768-69 (Tex.App.-Dallas 2011, pet. granted). We affirm the judgment of the court of appeals, but on different grounds. We hold that the Legislature’s adoption of the proportionate responsibility scheme in Chapter 33 of the Civil Practice and Remedies Code evidenced its clear intention that a plaintiffs illegal conduct not falling within a statutorily-recognized affirmative defense be apportioned rather than barring recovery completely. The common law unlawful acts doctrine cannot coexist with this scheme. Accordingly, we affirm the court of appeals’ judgment that reversed the summary judgment and remanded the case to the trial court for further proceedings.

I. Factual and Procedural Background

On February 2, 2007, Geoffrey Dugger went to his friend Joel Martinez’s house. While getting ready to leave the house, Dugger saw Martinez put in his pocket “cheese” — a mixture of black-tar heroin and Tylenol PM. After purchasing tequila and a cigar, which they later filled with marijuana to make a “blunt,” the two men returned to the house where Dugger lived with his parents. While in Dugger’s bedroom and backyard, both men consumed several tequila drinks, snorted lines of cheese, and smoked marijuana. Later in the evening, Martinez fell asleep while watching television. About thirty minutes later, Dugger noticed that Martinez was making a choking sound and subsequently began vomiting. Dugger yelled for his parents, and they came down the hall to his bedroom. Instead of calling 911, Dug-ger called Martinez’s mother, Mary Ann Arredondo, and told her that Martinez had been drinking and was throwing up. Ar-redondo told Dugger to let Martinez sleep it off. After another fifteen minutes had passed, Dugger’s father called 911. The police arrived about five minutes later, shortly after midnight. The paramedics arrived about ten minutes after the police. Dugger did not tell the police or paramedics that Martinez had ingested heroin, only that he drank tequila and smoked marijuana. The paramedics treated Martinez for alcohol poisoning, but their efforts proved unavailing. Martinez died less than two hours after the call to 911.

Arredondo sued Dugger under the wrongful death and survival statutes, alleging that Dugger was negligent both in failing to call 911 immediately and in failing to disclose Martinez’s heroin use to the paramedics. See Tex. Civ. Prac. & Rem. Code §§ 71.002(a)-(b), .021. In his answer, Dugger asserted an affirmative defense based on the common law unlawful acts doctrine, which bars a plaintiff from recovery if, at the time of injury, he was engaged in an unlawful act that was “inextricably intertwined with the claim and the alleged damages would not have occurred but for the illegal act.” Sharpe v. Turley, 191 S.W.3d 362, 366 (Tex.App.-Dallas 2006, pet. denied); accord Johnson, 9 S.W. at 603; Russell v. Ingersoll-Rand Co., 841 S.W.2d 343, 347 (Tex.1992) (providing that any defenses that would be available against the decedent if he or she were alive may be asserted against his or her estate). Dugger then moved for summary .judgment on his affirmative defense based on the unlawful acts doctrine, which the trial court granted. The trial court denied Arredondo’s motion for rehearing and motion for new trial. Arredondo appealed, arguing that section 93.001 of the Civil Practice and Remedies Code replaced the common law unlawful acts doctrine, and that the statutory affirmative defense did not apply in this case. The court of appeals reversed, holding that section 93.001 supersedes the common law unlawful acts doctrine. 347 S.W.3d at 769. We granted Dugger’s petition. 55 Tex.Sup.Ct.J. 757 (Tex. June 8, 2012).

II. Analysis of Unlawful Acts Doctrine Jurisprudence

The issue before us is whether the common law unlawful acts doctrine remains available as an affirmative defense to completely bar a plaintiffs recovery in tort cases in light of Texas’s proportionate responsibility scheme and the Legislature’s more recent enactment providing for an affirmative defense based on a plaintiffs felonious conduct. Dugger argues that an affirmative defense based on the unlawful acts doctrine is available in personal injury and wrongful death cases even when the elements of section 93.001’s statutory affirmative defense are not satisfied. Arredon-do argues that the unlawful acts doctrine conflicts not only with section 93.001, but also with the proportionate responsibility scheme in Chapter SB of the Civil Practice and Remedies Code, which replaced former common law defenses that provided a complete bar to recovery in tort cases. See Tex. Civ. Prac. & Rem.Code §§ 33.001-.004. We agree with Arredondo that the Legislature’s enactment of Chapter 33’s proportionate responsibility scheme and section 93.001 are dispositive in this case.

“[Statutes can modify common law rules, but before we construe one to do so, we must look carefully to be sure that was what the Legislature intended.” Energy Serv. Co. of Bowie v. Superior Snubbing Servs., Inc., 236 S.W.3d 190, 194 (Tex.2007). In construing statutes, our goal is to give effect to the intent expressed by the language in the statute. City of Rockwall v. Hughes, 246 S.W.3d 621, 625 (Tex.2008) (citing State v. Shumake, 199 S.W.3d 279, 284 (Tex.2006)). We begin our analysis by reviewing the common law unlawful acts doctrine.

A. The Unlawful Acts Doctrine

More than 120 years ago, this Court recognized the common law unlawful acts doctrine as barring a plaintiff from recovering damages if it could be shown that, at the time of injury, the plaintiff was engaged in an illegal act that contributed to the injury. See Johnson, 9 S.W. at 603. The doctrine originated with the principle of in pari delicto or “unclean hands” in the contract context, but was extended to tort causes of action. See Rico v. Flores, 405 F.Supp.2d 746, 759-61 (S.D.Tex.2005) (describing the use of the unlawful acts and in pari delicto doctrines in Texas jurisprudence), rev’d on other grounds, 481 F.3d 234 (5th Cir.2007). The doctrine is based on the public policy that wrongdoers should not be compensated for their immoral acts. See, e.g., Ward v. Emmett, 37 S.W.3d 500, 502 (Tex.App.-San Antonio 2001, no pet.); Saks v. Sawtelle, Goode, Davidson & Troilo, 880 S.W.2d 466, 470-71 (Tex.App.-San Antonio 1994, writ denied).

As early as 1888, we recognized that “no action will lie to recover a claim for damages, if to establish it the plaintiff requires aid from an illegal transaction, or is under the necessity of showing or in any manner depending upon an illegal act to which he is a party.” Johnson, 9 S.W. at 603 (holding that the unlawful acts doctrine did not apply because there was no allegation or proof showing that, at the time of the injury, the plaintiff did any illegal act contributing to his injury). Since then, “[cjourts throughout Texas ... have used this rule, along with public policy principles, to prevent a plaintiff from recovering damages that arose out of his or her own illegal conduct.” Ward, 37 S.W.3d at 502 (internal citations omitted). Courts applying the unlawful acts doctrine have required that the plaintiffs illegal act be “inextricably intertwined” with the claim for the illegal act to bar recovery. See, e.g., id. at 503. An illegal act is “inextricably intertwined with the claim” if a plaintiff cannot prove a claim without having to prove his or her own illegal act. See, e.g., Norman v. B.V. Christie & Co., 363 S.W.2d 175, 177-78 (Tex.Civ.App.-Houston 1962, writ ref'd n.r.e.) (quoting Stone v. Robinson, 234 S.W. 1094, 1095 (Tex.1921)). In Texas tort cases, the doctrine has most recently arisen in medical and legal malpractice cases. See, e.g., Ward, 37 S.W.3d at 501; Saks, 880 S.W.2d at 470.

Recently, scholars and courts have disagreed over the viability of the unlawful acts doctrine in modern jurisprudence. The Restatement (Second) of Torts and respected legal scholars reject the principle that tortious or criminal conduct can completely bar recovery. See Restatement (Seoond) of Torts § 889 (1979); W. Page Keeton et al., Prosser and Keeton on Torts 232 (5th ed.1984); see generally Joseph H. King, Jr., Outlaws and Outlier Doctrines: The Serious Misconduct Bar in Tort Law, 43 Wm. & Mary L.Rev. 1011 (2002) (suggesting that the unlawful acts doctrine, or “serious misconduct bar,” should be abandoned by American courts). Several courts and legislatures, on the other hand, have approved of the unlawful acts doctrine in statutes and case law. See, e.g., Alaska Stat. § 09.65.210 (2012) (setting out a detailed statutory affirmative defense based on the unlawful acts doctrine); Barker v. Kallash, 63 N.Y.2d 19, 479 N.Y.S.2d 201, 468 N.E.2d 39, 43-44 (1984) (holding that a teenager who was injured while constructing a “pipe bomb” could not recover from the young boy who supplied the gun powder); see also Vincent R. Johnson, The Unlawful Conduct Defense in Legal Malpractice, 77 UMKC L.Rev. 43, 45 (2008) (“Today, in an important range of cases, statutes and court decisions, in many states, now provide that injuries arising from the plaintiffs serious unlawful conduct are not compensable under tort law.”).

Since Texas’s shift to the proportionate responsibility scheme, discussed below, most Texas courts have used a plaintiffs unlawful act to measure proportionate responsibility and reduce recovery, rather than completely bar the plaintiff from recovering damages. See, e.g., Fifth Club, Inc. v. Ramirez, 196 S.W.3d 788, 790, 797-98 (Tex.2006) (allowing a publicly intoxicated plaintiff to recover for injures sustained by a security guard); Thomas v. Uzoka, 290 S.W.3d 437, 445-46 (Tex.App.-Houston [14th Dist.] 2009, pet. denied) (permitting a decedent’s wife to recover despite the decedent’s failure to wear a seatbelt). We turn next to Chapter 33’s proportionate responsibility scheme and consider whether the Legislature intended it to abrogate the common law unlawful acts doctrine as a complete bar to a plaintiffs recovery.

B. Chapter 33 — Proportionate Responsibility

Before the Legislature enacted the proportionate responsibility scheme, Texas followed the all-or-nothing system of contributory negligence. Parker v. Highland Park, Inc., 565 S.W.2d 512, 518 (Tex.1978). Under contributory negligence, if a plaintiff was even one percent at fault, he or she could not recover. See id. In 1973, the Legislature adopted article 2212a, the first comparative negligence statute, “evidencing] a clear policy purpose to apportion negligence according to the fault of the actors.” Id.; see also Act of April 9, 1973, 63d Leg., R.S., ch. 28, §§ 1-2, 4-5, art. 2212a, 1973 Tex. Gen. Laws 41, 41-43, repealed by Act of June 16, 1985, 69th Leg., R.S., ch. 959, § 1, sec. 33.001, 1985 Tex. Gen. Laws 3242, 3270-71. Later, article 2212a was replaced with the comparative responsibility framework in Chapter 33 of the Civil Practice and Remedies Code. See Tex. Civ. Prac. & Rem.Code §§ 33.001-.004; see also Act of June 16, 1985, 69th Leg., R.S., ch. 959, § 1, secs. 33.001-.004, 1985 Tex. Gen. Laws 3242, 3270-71, amended by Act of June 16, 1987, 70th Leg., 1st C.S., ch. 2, §§ 2.03-.12, secs. 33.001-004, 1987 Tex. Gen. Laws 37, 41-44; JCW Elecs., Inc. v. Garza, 257 S.W.3d 701, 703 (Tex.2008) (setting out the evolution of the comparative fault rules in Texas). In 1995, the Legislature modified Chapter 33 by replacing comparative responsibility with proportionate responsibility. Act of May 18, 1995, 74th Leg., R.S., ch. 136, § 1, 1995 Tex. Gen. Laws 971, 971-75 (amended 2003) (current version at Tex. Civ.Prac. & Rem.Code §§ 33.001-004); see JCW Elecs., 257 S.W.3d at 703. Section 33.003 currently provides:

(a) The trier of fact, as to each cause of action asserted, shall determine the percentage of responsibility, stated in whole numbers, for the following persons with respect to each person’s causing or contributing to cause in any way the harm for which recovery of damages is sought, whether by negligent act or omission, by any defective or unreasonably dangerous product, by other conduct or activity that violates an applicable legal standard, or by any combination of these:
(1) each claimant;
(2) each defendant;
(3) each settling person; and
(4) each responsible third party who has been designated under Section 33.004.

Tex. Civ. Prac. & Rem.Code § 33.003(a). The proportionate responsibility scheme applies to “any cause of action based on tort in which a defendant, settling person, or responsible third party is found responsible for a percentage of the harm for which relief is sought.” Id. § 33.002.

C. Unlawful Conduct in Wrongful Death Cases

The wrongful death statute provides that “[a] person is liable for damages arising from an injury that causes an individual’s death if the injury was caused by the person’s or his agent’s or servant’s wrongful act, neglect, carelessness, unskillfulness, or default.” Id. § 71.002(b). Parents may bring a wrongful death action on behalf of their deceased children. See id. § 71.004.

It is clear from the statute and our precedent that Chapter 33 applies to wrongful death claims. See, e.g., Russell, 841 S.W.2d at 347. By its terms, Chapter 33 expressly applies to “any cause of action based on tort.” Tex. Civ. Prac. & Rem.Code § 33.002. In addition, we have held that, under the wrongful death statute, a defendant may assert any defense against the claimant that he might have asserted against the decedent, if the decedent were alive. Russell, 841 S.W.2d at 347. This formerly included the defense of contributory negligence. See id. (citing Vassallo v. Nederl-Amerik Stoomv Maats Holland, 162 Tex. 52, 344 S.W.2d 421, 424 (1961)). Further, we have recognized federal case law that holds that Texas comparative negligence precluded recovery in a wrongful death case because the decedent’s negligence was greater than the tortfeasor’s. See id. at 347 n. 7 (citing Mayo v. Tri-Bell Indus., Inc., 787 F.2d 1007, 1009 (5th Cir. 1986)). Finally, courts throughout the state generally accept that proportionate responsibility applies to wrongful death cases. See, e.g., Pastor v. Champs Rest., Inc., 750 S.W.2d 335, 338 (Tex.App.-Houston [14th Dist.] 1988, no writ) (remanding the case to the trial court to compare the decedent’s negligence and bar’s negligence in wrongful death case); Velasquez v. Levingston, 598 S.W.2d 346, 349 (Tex.Civ.App.-Corpus Christi 1980, no writ) (holding that recovery was precluded by then operative Texas comparative negligence statute because the decedent’s negligence was greater than the tortfeasor’s).

Because Chapter 33’s proportionate responsibility scheme applies to wrongful death cases, and therefore applies to Arre-dondo’s case, we must determine whether the common law unlawful acts doctrine is available as an affirmative defense under the proportionate responsibility framework. We conclude that it is not. The plain language of section 33.008 clearly indicates that the common law unlawful acts doctrine is no longer a viable defense. Section 33.003 provides, in pertinent part:

The trier of fact ... shall determine the percentage of responsibility ... with respect to each person’s causing or contributing to cause in any way the harm for which recovery of damages is sought, whether by negligent act or omission, by any defective or unreasonably dangerous product, by other conduct or activity that violates an applicable legal standard ....

See Tex. Civ. Prac. & Rem.Code § 33.003(a) (emphasis added). The language of the statute indicates the Legislature’s desire to compare responsibility for injuries rather than bar recovery, even if the claimant was partly at fault or violated some legal standard. See Parker, 565 S.W.2d at 518 (discussing article 2212a, which is now Chapter 33). Therefore, we hold that Chapter 33 controls over the unlawful acts doctrine in the wrongful death context.

The dissent contends that the unlawful acts doctrine and Chapter 33 may coexist as separate legal concepts. See 408 S.W.3d at 842. Nothing in Chapter 33 or in our case law suggests that the unlawful acts doctrine acts as an exception to the proportionate responsibility scheme, however. See Parker, 565 S.W.2d at 518 (holding that Chapter 33 replaces common law doctrines that lead to a “system of absolute victory or total defeat”). Proportionate responsibility abrogated former common law doctrines that barred a plaintiffs recovery because of the plaintiffs conduct — like assumption of the risk, imminent peril, and last clear chance — in favor of submission of a question on proportionate responsibility. See Del Lago Partners, Inc. v. Smith, 307 S.W.3d 762, 772 (Tex.2010). When the Legislature intends an exception to Chapter 33’s broad scheme, it creates specific exceptions for matters that are outside the scope of proportionate responsibility. See F.F.P. Operating Partners, L.P. v. Duenez, 237 S.W.3d 680, 690-91 (Tex.2007). In the context of criminal actions, for example, the Legislature did just that, removing certain criminal acts performed in concert with another person from the proportionate responsibility scheme and instead imposing joint and several liability. See Act of May 18, 1995, 74th Leg., R.S., ch. 136, § 1, sec. 33.002, 1995 Tex. Gen. Laws 971, 972, repealed by Act of June 11, 2003, 78th Leg., R. S., ch. 204, § 4. 10, sec. 33.002, 2003 Tex. Gen. Laws 859, 859. We find no such indication that the Legislature intended a plaintiffs unlawful conduct to be treated differently from the other common law defenses under the former contributory negligence scheme, or that the Legislature intended it to be an exception to proportionate responsibility. We hold that the unlawful acts doctrine fits within the categories of former common law defenses that are now exclusively controlled by Chapter 33’s proportionate responsibility scheme.

Further, we have accepted the concept that those who voluntarily put themselves in dangerous situations are not necessarily barred from recovering from other negligent individuals. For example, we have held that an individual who voluntarily became intoxicated and was injured while driving his car may recover against the establishment that served him the alcohol. See Smith v. Sewell, 858 S.W.2d 350, 355 (Tex.1993). While “[hjistorically, an individual who voluntarily became intoxicated was precluded from suing a tavern owner for his own injuries,” id. at 352 (citing 1 James H. MosheR, Liquor Liability Law § 2.02[6][a](1990)), the Legislature in 1987 established a cause of action against providers of alcohol under certain circumstances by enacting Chapter 2 of the Alcoholic Beverage Code. See Tex. Alco. Bev. Code § 2.08; see also Act of June 11,1987, 70th Leg., R.S., ch. 303, § 3, sec. 202, 1987 Tex. Gen. Laws 1673, 1674. Therefore, in Smith v. Sewell, we held that, under Chapter 2, an individual who was voluntarily intoxicated was not barred from recovery, and that Chapter 33 was applicable to a cause of action under Chapter 2 against an alcoholic beverage provider. See 858 S.W.2d at 355-56. We noted that “when it is the intoxicated individual who is injured due to his own intoxication, it is particularly appropriate that his conduct in contributing to his injury should be considered in assessing the amount of recovery, if any, to which he is entitled.” Id. at 356. It follows that, like the rule prohibiting voluntarily intoxicated individuals from recovering from a tavern owner, the adoption of the proportionate responsibility framework abrogated use of the common law unlawful acts doctrine to bar recovery in the tort context.

Dugger cites several cases in which a plaintiff was precluded from recovering damages in the legal malpractice context due to the plaintiffs underlying criminal conduct. See, e.g., Sharpe v. Turley, 191 S.W.3d 362, 365-69 (Tex.App.-Dallas 2006, pet. denied); Saks v. Sawtelle, Goode, Davidson & Troilo, 880 S.W.2d 466, 467 (Tex.App.-San Antonio 1994, writ denied); Dover v. Baker, Brown, Sharman & Parker, 859 S.W.2d 441, 450-51 (Tex.App.Houston [1st Dist.] 1993, no writ). While the public policy underlying the unlawful acts doctrine may be similar to the policy behind those cases, the context makes those cases unique. In Peeler v. Hughes & Luce, 909 S.W.2d 494 (Tex.1995), we held that a client’s criminal conduct, as a matter of law, was the sole proximate or producing cause of the client’s conviction, and that the client could not bring a legal malpractice claim unless she had been exonerated from the criminal conviction. Id. at 496-98. Because the client’s conduct, and not the attorney’s, is the sole cause of any injury resulting from conviction, the plaintiff cannot satisfy the causation element of a legal malpractice claim absent exoneration. See id. While some courts of appeals have extended that reasoning to civil defendants bringing legal malpractice actions, we have not directly addressed that issue. See, e.g., Sharpe, 191 S.W.3d at 369 (precluding a plaintiff from recovering from an attorney after a finding that summary judgment evidence established that the plaintiffs conduct forming the basis of the underlying civil fraud claim was unlawful). As it is not before us, we do not do so now, and we limit the holding in this case to personal injury and wrongful death cases.

We next consider section 93.001 of the Civil Practice and Remedies Code and how it interacts with Chapter 33.

III. Section 93.001 of the Civil Practice and Remedies Code

In 1987, the Legislature enacted section 93.001 of the Civil Practice and Remedies Code, providing an affirmative defense to civil actions brought by convicted criminals seeking to recover damages for injuries arising out of their felonious acts. See Tex. Civ. Prac. & Rem.Code § 93.001; see also Act of June 19, 1987, 70th Leg., R.S., ch. 824, § 1, sec. 93.001, 1987 Tex. Gen. Laws 2856, 2856. The statute provides:

(a) It is an affirmative defense to a civil action for damages for personal injury or death that the plaintiff, at the time the cause of action arose, was:
(1) committing a felony, for which the plaintiff has been finally convicted, that was the sole cause of the damages sustained by the plaintiff; or
(2) committing or attempting to commit suicide, and the plaintiffs conduct in committing or attempting to commit suicide was the sole cause of the damages sustained; provided, however, if the suicide or attempted suicide was caused in whole or in part by a failure of the party or any defendant to comply with an applicable legal standard, then which suicide or attempted suicide shall not be a defense.
(b) This section does not apply in any action brought by an employee, or the surviving beneficiaries of an employee, under the Workers’ Compensation Law of Texas, or in any action against an insurer based on a contract of insurance, a statute, or common law.
(c) In an action to which this section applies, this section shall prevail over any other law.

Tex. Civ. Prac. & Rem.Code § 93.001. It is undisputed that section 93.001 may not be used as an affirmative defense in this case. Martinez was never finally convicted, nor is there any indication that Martinez committed suicide as required by subsection 93.001(a)(2). See id.

We must still consider the language of section 93.001, however, to determine whether it evinces legislative intent that the common law unlawful acts doctrine remain available as an affirmative defense when the statutory affirmative defense is not, as Dugger argues. Subsection 93.001(a) initially indicates broad applicability to personal injury and wrongful death cases, but then limits the availability of the affirmative defense to two circumstances. See id. § 93.001(a). First, subsection 93.001(a)(1) limits the affirmative defense to cases in which both (1) the plaintiff was finally convicted, and (2) the felony was the sole cause of the damages. See id. The phrase “for which the plaintiff has been finally convicted” is an expression of a narrow policy of the state that convicted wrongdoers who committed the most serious crimes should not be permitted to recover. Id. § 93.001(a)(1). The narrow focus of subsection 93.001(a)(1) might, in effect, preclude its utility, as the dissent notes, where the plaintiff dies before conviction. See 408 S.W.3d at 842. Yet this anomaly is less evidence of absurdity than recognition of the Legislature’s policy choice that only criminals actually convicted of the most serious crimes will be barred from recovery. Although there is some overlap with the policy underlying the common law unlawful acts doctrine, the statute embodies this policy in a limited and narrow way. Second, subsection 93.001(a)(2) limits the affirmative defense to instances in which the plaintiff was committing or attempting suicide. This is entirely beyond the scope of the unlawful acts doctrine, although the policy underlying the common law doctrine certainly lends support for the suicide affirmative defense. But, again, although Dugger argues that the broad unlawful acts doctrine survived Chapter 33 and section 93.001, nothing in the statute suggests such legislative intent. See generally Tex. Civ. Prac. & Rem.Code § 93.001. In fact, subsections 93.001(b) and (c) clearly contemplate that the affirmative defense is not available in all cases, and subsection 93.001(a) specifies the narrow circumstances in which a plaintiffs recovery is barred by the plaintiffs conduct.

Arredondo argues that the language in subsection 93.001(c), stating “this section shall prevail over any other law,” expresses the Legislature’s intention for this statute to supersede the unlawful acts doctrine. Dugger contends that the phrase “an action in which this section applies,” limits the statutory affirmative defense to cases in which (1) there has been a final conviction, or (2) there has been a suicide or attempted suicide, but the common law unlawful acts doctrine is available in all other personal injury or wrongful death actions. In considering these competing interpretations, we presume the Legislature enacts a statute with knowledge of existing law. Acker v. Tex. Water Comm’n, 790 S.W.2d 299, 301 (Tex.1990) (citing McBride v. Clayton, 140 Tex. 71, 166 S.W.2d 125, 128 (1942)). When section 93.001 was enacted in 1987, article 2212a’s comparative negligence already existed. Compare Act of June 19, 1987, 70th Leg., R.S., ch. 824, § 1, sec. 93.001, 1987 Tex. Gen. Laws 2856, 2856 (enactment of § 93.001 in 1987), with Act of April 9, 1973, 63d Leg., R.S., ch. 28, §§ 1-2, 4-5, art. 2212a, 1973 Tex. Gen. Laws 41, 41-43 (repealed 1985) (art. 2212a in effect in 1987). Chapter 33, as amended in 1987 — the same legislative session as the enactment of section 93.001 — provided that “[i]n an action to recover damages for negligence resulting in personal injury, property damage, or death ... a claimant may recover damages only if his percentage of responsibility is less than or equal to 50 percent.” Act of June 16, 1987, 70th Leg., 1st C. S., ch. 2, § 2.04, sec. 33.001(a), 1987 Tex. Gen. Laws 37, 41 (amended 1993); compare id.(amendment of Chapter 33 in 1987 by 70th Legislature), with Act of June 19, 1987, 70th Leg., R.S., ch. 824, § 1, sec. 93.001, 1987 Tex. Gen. Laws 2856, 2856 (enactment of § 93.001 in 1987 by 70th Legislature). Although section 93.001 does not expressly state what “other law” it prevails over, the Legislature likely intended it to prevail over Chapter 33’s proportionate responsibility scheme, which had already abrogated the common law unlawful acts doctrine defense. See Tex. Civ. Prac. & Rem.Code § 93.001. The dissent suggests that section 93.001 is a mere reaffirmation by the Legislature of the continued vitality of the unlawful acts doctrine in the context in which a plaintiff was engaged in criminal conduct and subsequently convicted. 408 S.W.3d at 840. In light of Chapter 33’s abrogation of common law defenses that provide a complete bar to plaintiffs recovery — including the unlawful acts doctrine — we interpret subsection 93.001(c) as an indication that the Legislature intended the statutory affirmative defense to resurrect only a small portion of the unlawful acts doctrine, providing a complete bar to recovery only in the certain limited circumstances articulated by subsections 93.001(a)(1) and (2). See Tex. Civ. Prac. & Rem.Code § 93.001(c).

IV. Public Policy

Dugger and the dissent argue that if we do not uphold the unlawful acts doctrine, it will be easier for criminals to bring suits and recover. See 408 S.W.3d at 837-38. On the other hand, Arredondo argues that recognizing the unlawful acts doctrine could lead to a slippery slope where it would be impossible for many people to access the judicial system and try their claims because they were engaged in an unlawful act while sustaining injuries. Additionally, the Texas Civil Rights Project, as amicus curiae, contends that a broad unlawful acts doctrine could allow people who commit serious tortious conduct against others to have civil immunity merely because the claimant was not in compliance with every law at the time of the tortious conduct. Cf. City of Lancaster v. Chambers, 883 S.W.2d 650, 653-55 (Tex.1994) (holding that an injured passenger in a fleeing vehicle could maintain a suit for unreasonable chase because officers owed a duty of reasonable care).

The Legislature has resolved this conflict, however, with the enactment of proportionate responsibility. A plaintiffs actions are taken into account in calculating recovery, but do not completely bar recovery unless his or her actions account for more than fifty percent of the responsibility or satisfy the elements of the statutory affirmative defense in section 93.001. Tex. Civ. Prac. & Rem.Code. §§ 33.001, .003; id. § 93.001. Further, sections 93.001 and 86.002 of the Civil Practice and Remedies Code speak to the policy of the state that in only a very limited set of circumstances will a plaintiff be barred from recovery. See Fairfield Ins. Co. v. Stephens Martin Paving, LP, 246 S.W.3d 653, 665 (Tex.2008) (“The Legislature determines public policy through the statutes it passes.” (citing Town of Flower Mound v. Stafford Estates Ltd. P’ship, 135 S.W.3d 620, 628 (Tex.2004))). To hold that the unlawful acts doctrine applies broadly in the tort context despite the plain language of Chapter 33 and the legislative policy expressed in section 93.001 would render section 93.001 meaningless. See Hunter v. Fort Worth Capital Corp., 620 S.W.2d 547, 551 (Tex.1981) (“To hold otherwise would violate the rule of statutory construction that the [L]egislature is never presumed to do a useless act”). Nor does this interpretation compel the conclusion that the Legislature intended to make it easier for criminals to bring suit. Following a broad trend, the Legislature has embraced proportionate responsibility. See Restatement (THIRD) OF TORTS: APPORTIONMENT OF Liability, § 1 cmt. a (2000) (highlighting the almost universal shift from contributory negligence to comparative responsibility). The limited nature of the statutory affirmative defense in section 93.001, requiring a conviction in order to bar suit, reflects that trend as well as the Legislature’s prerogative to recognize an exception that applies only under very narrow circumstances.

Y. Conclusion

We hold that the common law unlawful acts doctrine is not available as an affirmative defense in personal injury and wrongful death cases. Like other common law assumption-of-the-risk defenses, it was abrogated by Chapter 33’s proportionate responsibility scheme. Unless the requirements of the affirmative defense in section 93.001 are satisfied, a plaintiffs share of responsibility for his or her injuries should be compared against the defendant’s. We therefore affirm the judgment of the court of appeals, which reversed the summary judgment and remanded the case to the trial court.

Justice HECHT filed a dissenting opinion, in which Justice WILLETT and Justice DEVINE joined.

Justice HECHT,

joined by Justice WILLETT and Justice DEVINE, dissenting.

Given that we have repeatedly refused to hold a social host liable for providing alcohol to a guest, one will wonder why we are engaging in the unlikely assumption that a social host may be liable for not preventing a guest from overdosing on his own heroin. The answer is that the parties have agreed to argue only the applicability of the common-law unlawful acts doctrine as a defense to liability, assuming some duty of care exists. The viability of the common-law doctrine is so conjectural in this case, we ought to leave the issue for another day. But the Court holds that the doctrine has been abrogated by statute — specifically, by the comparative responsibility scheme in Chapter 38 of the Texas Civil Practice and Remedies Code, and by a statute on the affirmative defense of assumption of the risk, Section 93.001 of the Code.

Correctly understood, the unlawful acts doctrine has nothing to do with comparative fault. A plaintiff who kills himself by ingesting too much of a substance he knows or should know is toxic is at fault irrespective of whether his actions are illegal. The doctrine holds that in some instances a plaintiff whose injuries are directly caused by conduct in which he was forbidden by law to engage is not entitled to assert a claim for damages against someone whose fault may also have caused the injury. Confusing felonies with tor-tious conduct, as the Court does, ends up treating heroin like aspirin.

Section 93.001, the other basis for today’s ruling, is nothing more than the Legislature’s reaffirmation that the unlawful acts doctrine applies specifically when the plaintiff or her decedent was not only engaged in criminal conduct but was also convicted of the crime. Nothing in the statutory text suggests that it was intended to abrogate the broader common-law defense. The Court interprets the statute as limiting the defense to certain situations — when nothing suggests that it does — thereby rendering the statute largely ineffectual, even in the situations it purports to cover. It defies reason to think that the Texas Legislature in 1987 intended to make it easier for criminals to recover damages for injuries they caused themselves while committing illegal acts.

Accordingly, I respectfully dissent.

Before turning to the legal issues, we should have the facts in mind. Geoffrey Dugger, 25 at the time, and Joel Martinez, 21, friends for several years, decided to spend Friday evening together doing what they often did: drinking alcohol, smoking marijuana, and snorting “cheese” — black tar heroin mixed with Tylenol PM®. Martinez lived with his mother, Mary Ann Arredondo, and stepfather in their home. When Dugger drove over to pick him up, Martinez was drinking a beer and said he had been snorting cheese. Dugger saw Martinez put three or four baggies of black tar heroin in his pocket, and as they left, Martinez asked Arredondo for Tylenol for a headache. On the way to Dugger’s parents’ home, where Dugger lived, he and Martinez stopped to buy a fifth of tequila and cigars to fill with the marijuana they had. On arrival, they visited with Dug-ger’s parents a few minutes, then went to his bedroom where they spent the evening watching television, listening to music, eating pizza, drinking tequila, and snorting cheese. At one point, they went out in the backyard and smoked marijuana.

As midnight approached, Martinez complained that he did not feel well. He drank a little water and fell asleep. Not long after, he began to make a gurgling sound as if he were trying to vomit, and Dugger could not wake him. Alarmed, Dugger called down the hall to his parents. Dugger called Martinez’s mother, Arre-dondo, but Dugger told her only that Martinez was throwing up, and that he and Martinez had been drinking, not that they had been using drugs. But eight minutes later, Dugger’s mother called Arredondo to tell her to come immediately, and that Martinez looked like he was dying. Arre-dondo arrived only five or six minutes later. Dugger’s father called 9-1-1. Police and paramedics arrived within a few minutes, but Dugger did not tell them, either, that Martinez had been using drugs. Martinez never revived and died about an hour later at the hospital.

Arredondo sued Dugger almost two years later, alleging that Dugger was negligent in allowing Martinez into his parents’ home “to consume dangerous quantities of illegal substances that [Dugger] knew or should have known could foresee-ably result in serious bodily injury and/or death to [Martinez]”, in failing to timely call 9-1-1, and in failing to disclose Martinez’s drug consumption to Arredondo and the police and paramedics.

The common law regarding a criminal’s entitlement to the benefits and protections of the law has evolved over centuries. Pollock and Maitland explain that before the Norman Conquest, it was decreed of outlaws, caput gerat lupinum:

He who breaks the law has gone to war with the community; the community goes to war with him. It is the right and duty of every man to pursue him, to ravage his land, to burn his house, to hunt him down like a wild beast and slay him; for a wild beast he is; not merely is he a ‘friendless man,’ he is a wolf.

Outlawry was banned by the Magna Char-ta and by the thirteenth century “had lost its exterminating character”, but the law remained draconian: “[o]f every proprietary, possessory, contractual right [the outlaw] is deprived”. In time, outlawry rightly came to be regarded as barbaric. Outlawry is prohibited by the Texas Constitution.

But while the law has come to take a measured view of what rights should be forfeited as a consequence of illegal conduct, it has retained a resistance to asserting rights based on illegal conduct in certain instances. In Justice Cardozo’s words, there remains, “deeply fastened in universal sentiments of justice, the principle that no man should profit from his own inequity or take advantage of his own wrong.” The Latin maxim, ex turpi causa non oritur actio, expresses a similar idea. Thus, the law restricts recovery on illegal contracts, and while the principle’s application to tort law has become controversial, at the beginning of the twentieth century, it was “conceded by all, that if an unlawful act was the cause, or concurring cause, of the damage, the action is barred.” That was certainly this Court’s view in 1888, when it wrote in Gulf, C. & S.F. Ry. v. Johnson:

It may be assumed, as undisputed doctrine, that no action will lie to recover a claim for damages, if to establish it the plaintiff requires aid from an illegal transaction, or is under the necessity of showing or in any manner depending upon an illegal act to which he is a party.... In all the cases where a recovery of damages for some injury has been denied upon the ground of vice or illegality in the plaintiffs cause of action, it is upon the principle that the wrong of the plaintiff must have been some act or conduct having the relation to that injury of a cause to the effect produced by it. In those cases where it is shown that, at the time of the injury, the plaintiff was engaged in the denounced or illegal act, the rule is, if the illegal act contributed to the injury, he cannot recover; but, if plaintiffs act did not contribute to the injury, the fact alone that at the time he was engaged in an act in violation of law will not of itself preclude a recovery.

This is what we have called the unlawful acts doctrine.

The doctrine absolutely bars a claim of liability. A court’s refusal to enforce an illegal contract is not to benefit or punish either party but to protect public policy in not allowing the law to further an illegal purpose, The application in tort cases serves the same end. When contributory negligence was also an absolute bar to liability, there was little need to invoke the unlawful acts doctrine as a defense. But with the advent of comparative responsibility, the basis for the contributory negligence defense has narrowed: a plaintiff is precluded only from recovering those damages he himself caused. There has been no corresponding change in the basis for the unlawful acts doctrine: it remains an absolute bar to liability.

For this reason, Chapter 33 expressly does not apply to an action in which the unlawful acts doctrine is invoked. Section 33.002(a)(1) states in pertinent part: “This chapter applies to ... any cause of action based on tort in which a defendant, settling person, or responsible third party is found responsible for a percentage of the harm for which relief is sought”. When the unlawful acts doctrine applies, no such party can be found responsible for a percentage of the plaintiffs harm because the plaintiffs action is barred.

The Court seems to think that because Chapter 33 abrogated other common law doctrines that barred recovery based on the plaintiffs conduct, like assumption of the risk, imminent peril, and last clear chance, it also abrogated the unlawful acts doctrine. But comparative responsibility determines the amount of recovery based on an allocation of fault contributing to injury. The unlawful acts doctrine holds that the allocation should not be made because any recovery rewards criminal conduct. This case is a good example. Assuming, as we must, that Dugger should have called 9-1-1 a few minutes earlier and should have disclosed Martinez’s ingestion of heroin, what is his percentage of responsibility? How much should Dugger pay Arredondo for not acting promptly and not being forthcoming when Martinez was prohibited by law from ingesting the drug that killed him? The point is not simply that the question is hard, though it is, and assigning it to a jury makes it no easier. The point is that to award any damages lessens the law’s prohibition against the use of heroin.

Now, if a robber slips in a puddle on the bank floor and breaks his leg, he can sue the bank. A rapist who falls in a hole in the victim’s backyard can sue for damages. Lest these examples be thought extreme or unlikely, consider this: can a teenager sue a boy who sold him fireworks from which he extracted gunpowder to make a pipe bomb that exploded in his hands? No, in New York, said the New York Court of Appeals in Barker v. Kallash. In Texas, after today, the answer is yes.

One criticism of the unlawful acts doctrine, a criticism with substance, is that it does not have sufficient limiting principles. The doctrine has proven especially difficult to apply against undocumented aliens. But that criticism is hardly fair when negligence is the failure to use ordinary care as would a reasonable person. The law has proven that it can infuse real meaning into general concepts like ordinary care and reasonableness. No one argues that a motorist broadsided by a drunk driver should be prohibited from recovering because he was driving five miles an hour over the speed limit. Nor should the doctrine be used to resurrect outlawry for undocumented aliens. It is true that in the nineteenth century, the doctrine was used to deny recovery to persons injured while violating Blue Laws. But if we were to discard every claim and defense that has been misused, there would be nothing left of the law. Properly applied, the doctrine serves the valuable purpose of promoting compliance with the law and should be retained.

When the purpose of a criminal law is to protect a plaintiff and his violation of that law is the direct cause of injury that would not have occurred otherwise, he should not be permitted to sue another. As Justice Brandéis observed in another context:

The governing principle ... is that a court will not redress a wrong when he who invokes its aid has unclean hands.... The court’s aid is denied ... when [the plaintiff] has violated the law in connection with the very transaction as to which he seeks legal redress. Then aid is denied despite the defendant’s wrong. It is denied in order to maintain respect for law; in order to promote confidence in the administration of justice; in order to preserve the judicial process from contamination.

The unlawful acts doctrine was not abrogated by Chapter 33 and should remain part of the common law of Texas.

Finally, the doctrine has not been abrogated by Section 93.001. Section 93.001(a) states in pertinent part:

It is an affirmative defense to a civil action for damages for personal injury or death that the plaintiff, at the time the cause of action arose, was:
(1) committing a felony, for which the plaintiff has been finally convicted, that was the sole cause of the damages sustained by the plaintiff; or
(2) committing or attempting to commit suicide, and the plaintiffs conduct in committing or attempting to commit suicide was the sole cause of the damages sustained; provided, however, if the suicide or attempted suicide was caused in whole or in part by a failure on the part of any defendant to comply with an applicable legal standard, then such suicide or attempted suicide shall not be a defense.

One obvious problem, that a suicide victim can never be a plaintiff, can be cured by reading “plaintiff’ to include a decedent’s heirs and beneficiaries. The Court reads the statute not only to provide an affirmative defense, which it plainly does, but to confine the defense to the circumstances described. That interpretation renders the statute critically ineffectual and absurd because the defense cannot be used in wrongful death cases unless the decedent is convicted posthumously or the decedent lingers between injury and death long enough to be convicted. Since neither of those things is likely to ever happen, the statute provides an affirmative defense in wrongful death cases ... never.

Subsection (c) states: “In an action to which this section applies, this section shall prevail over any other law.” This plainly preempts any law that denies an affirmative defense in the circumstances described but leaves undisturbed a law that provides the defense in other situations, as the unlawful acts doctrine does. For the statute to have the effect the Court ascribes to it, it should state: “It is an affirmative defense to a civil action for damages for personal injury or death that ... ” — strike “that” and instead read— “only if....”

Even if the Court’s interpretation of the statutory text were reasonable, apart from the statute’s ostensible purpose and the interpretation’s effect on the law in severely limiting the common-law unlawful acts doctrine, it is simply inconceivable that the Legislature intended in enacting Section 93.001 to make it easier for criminals to sue for damages caused by their own illegal acts. For this, the Court has no answer.

The Court’s misinterpretation of Chapter 33 and Section 93.001 is patent in its effect on Texas law. Now a plaintiff cannot sue for breach of an illegal contract even if he himself was not at fault in the transaction, but a plaintiff directly injured by his own illegal conduct can sue in tort for damages.

The unlawful acts doctrine is not merely contributory negligence that can be compared with other fault in allocating responsibility for a plaintiffs injuries. Although it must not be misused, in appropriate cases the unlawful acts doctrine protects the integrity of the legal system. The doctrine has not been abrogated by either the comparative responsibility scheme in Chapter 33 or Section 93.001’s affirmative defense. Because the Court does not agree, I respectfully dissent. 
      
      .Arredondo argues that Dugger owed Martinez a duty because he created a dangerous situation by allowing drugs to be consumed at his house and therefore had a duty to prevent injury to others. See Buchanan v. Rose, 138 Tex. 390, 159 S.W.2d 109, 110 (1942) ("[I]f a party negligently creates a dangerous situation it then becomes his duty to do something about it to prevent injury to others if it reasonably appears or should appear to him that others in the exercise of their lawful rights may be injured thereby.”). Arredondo also asserts that because Dugger chose to partially disclose the nature of Martinez's medical distress to the paramedics, he was "deemed to have assumed a duty to tell the whole truth.” Union Pac. Res. Grp., Inc. v. Rhone-Poulenc, Inc., 247 F.3d 574, 584 (5th Cir.2001) (discussing the duty to disclose in the fraud context (citing Restatement (Second) of Torts § 552(2)(b) (1976))). Finally, Arredondo argues that Dugger owed Martinez a duty under section 38.15(a)(2) of the Texas Penal Code, which stales that "[a] person commits an offense if the person with criminal negligence interrupts, disrupts, impedes, or otherwise interferes with: ... (2) a person who is employed to provide emergency medical services including the transportation of ill or injured persons while the person is performing that duly.” Tex. Penal Code § 38.15(a)(2). We need not address this issue because the trial court rendered judgment solely on Dugger's traditional motion for summary judgment based on the unlawful acts doctrine, and that is the only issue before us.
     
      
      . In her response to Dugger's motion for summary judgment, Arredondo argued that Texas's proportionate responsibility scheme superseded the unlawful acts doctrine. Arre-dondo did not raise the argument directly when challenging the summary judgment on appeal, but does include it in her argument at this Court. See Tex.R.App. P. 38.1(f) ("The brief must state concisely all issues or points presented for review. The statement of an issue or point will be treated as covering every subsidiary question that is fairly included.”).
     
      
      . Arredondo brings her claims under sections 71.002(b) and 71.006 of the Wrongful Death Act. Tex. Civ. Prac. & Rem.Code §§ 71.002(b), .006. At the court of appeals, Arredondo argued that the Wrongful Death Act abrogated the common law unlawful acts doctrine, but she does not make that argument to this Court. Accordingly, that issue is not before us and we do not address it.
     
      
      . The unlawful acts doctrine is also referred to as the "outlaw doctrine,” the “ex turpi rule,” the “wrongful-conduct rule," and the "serious misconduct doctrine.” See Joseph H. King, Jr., Outlaws and Outlier Doctrines: The Serious Misconduct Bar in Tort Law, 43 Wm. & Mary L.Rev. 1011, 1019 & n. 35 (2002).
     
      
      . Section 86.002 of the Civil Practice and Remedies Code is a similar expression of the legislative policy that convicted criminals may not recover for injuries sustained while committing a crime. See Tex. Civ. Prac. & Rem Code § 86.002. Arredondo does not rely on section 86.002 to support her argument that the unlawful acts doctrine has been superseded. Thus, we do not address it.
     
      
      . Reeder v. Daniel, 61 S.W.3d 359, 364-365 (Tex.2001) (social host has no duty not to make alcohol available to minors); Smith v. Merritt, 940 S.W.2d 602, 605 (Tex.1997) (social host has no duty to passenger to prevent nineteen-year-old guest from drinking and driving); Graff v. Beard, 858 S.W.2d 918, 921-922 (Tex.1993) (social host has no duty to third party to prevent adult guest from drinking and driving).
     
      
      . 347 S.W.3d 757, 760 n. 2 ("Dugger’s motion [for summary judgment] also ... attacked] the elements of Arredondo’s claims. By a rule 11 agreement at the trial court, the parties submitted to the trial court only the unlawful acts doctrine defense.... ”).
     
      
      . See, e.g., Valenzuela v. Aquino, 853 S.W.2d 512, 514 (Tex.1993) (refusing to consider the possibility of a defense to liability not yet established).
     
      
      . All statutory references are to the Texas Civil Practice & Remedies Code unless otherwise noted.
     
      
      . The Court’s conclusion that Chapter 33 supplants the common-law unlawful acts doctrine may surprise the parties, since they mentioned Chapter 33 only in a few sentences in the trial court, not at all in the court of appeals, and in a total of three pages of briefing in this Court.
     
      
      . See Lord v. Fogcutter Bar, 813 P.2d 660, 662 n. 9 (Alaska 1991) (citing, as support for applying the unlawful acts doctrine, a statute providing that a "person who suffers personal injury or death may not recover damages ... if the injuries or death occurred while the person was engaged in the commission of a felony, the person has been convicted of the felony, including conviction based on a guilty plea or plea of nolo contendere, and the felony substantially contributed to the injury or death”).
     
      
      . Act of May 31, 1987, 70th Leg., R.S., ch. 824, 1987 Tex. Gen. Laws 2856.
     
      
      . 2 Frederick Pollock & Frederic Maitland, The History of English Law Before the Time of Edward I 449 (2d ed. Cambridge University Press 1899).
     
      
      . Magna Charta ch. 39, translated in 3 Vernon’s Annotated Constitution of the State of Texas 624, 628 (1993) (“No freeman shall be taken or imprisoned, or deseised, or outlawed, or banished, or any ways destroyed, nor will we pass upon him, nor will we send upon him, unless by the lawful judgment of his peers, or by the law of the land.”).
     
      
      . 2 Pollock & Maitland, supra note 8, at 449.
     
      
      . 1 id. at 477.
     
      
      . 2 id. at 450.
     
      
      . Tex. Const. art. I, § 20 ("No citizen shall be outlawed.’’). See In re J.W.T., 872 S.W.2d 189, 206-207 (Tex.1994) (Cornyn, J., dissenting) (tracing the prohibition of outlawry from Magna Charta to article I, section 20 of the Texas Constitution).
     
      
      . Benjamin N. Cardozo, The Nature of the Judicial Process 41 (Yale University Press 1921).
     
      
      . Lewis v. Davis, 145 Tex. 468, 199 S.W.2d 146, 151 (1947); see also Restatement (Second) of Contracts ch. 8, intro, note (1981) (addressing courts' willingness to refuse to enforce contracts on grounds of public policy, including discouraging undesirable conduct such as illegality).
     
      
      . See, e.g., Joseph H. King, Outlaws and Outlier Doctrines: The Serious Misconduct Bar in Tort Law, 43 Wm. & Mary L.Rev. 1011, 1019—1021 (2002); Bruce MacDougall, Ex Turpi Causa: Should a Defence Arise from a Base Cause?, 55 Sask. L.Rev. 1, 2 (1991); Robert A. Prentice, Of Tort Reform and Millionaire Muggers: Should an Obscure Equitable Doctrine be Revived to Dent the Litigation Crisis?, 32 San Diego L.Rev. 53, 57-62 (1995).
     
      
      . Harold S. Davis, The Plaintiff's Illegal Act as a Defense in Actions of Tort, 18 Harv. L.Rev. 505, 506 (1905).
     
      
      . 71 Tex. 619, 9 S.W. 602, 603 (1888) (internal citations omitted).
     
      
      . Lewis, 199 S.W.2d at 151; see also Restatement (Second) of Contracts, supra note 15.
     
      
      . See 1 Dan B. Dobbs et al., The Law of Torts § 228, at 816 (2011) ("Before the adoption of comparative negligence systems it would not have mattered whether the court invoked the immoral plaintiff principle or the contributory negligence bar, since both would have barred the plaintiff. After the adoption of comparative negligence, however, a rule that bars the claim of the immoral plaintiff potentially conflicts with the comparative negligence system of apportionment, which would only reduce damages.”); King, supra note 16, at 1020 ("The serious misconduct doctrine had essentially the same effect as contributory negligence, and was thus largely subsumed into the broader contributory negligence defense.”).
     
      
      . Contrast Lord v. Fogcutter Bar, 813 P.2d 660, 662 (Alaska 1991) (plaintiff, who was allegedly over-served by defendant before he left with a woman — and was later convicted of kidnapping and raping her — -was barred as a matter of public policy from recovering damages resulting from his imprisonment).
     
      
      . 63 N.Y.2d 19, 22-24, 28-29, 479 N.Y.S.2d 201, 468 N.E.2d 39, 40-44 (1984). Contrast Flanagan v. Baker, 35 Mass.App.Ct. 444, 449, 621 N.E.2d 1190, 1193 (1993) (a boy injured while constructing a pipe bomb out of fireworks in defendants’ basement was not barred from recovery).
     
      
      . But cf. Peeler v. Hughes & Luce, 909 S.W.2d 494, 498 (Tex.1995) ("Because of public policy, we ... hold that plaintiffs who have been convicted of a criminal offense may negate the sole proximate cause bar to their claim for legal malpractice in connection with that conviction only if they have been exonerated on direct appeal, through post-conviction relief, or otherwise.”); Sharpe v. Turley, 191 S.W.3d 362, 366 (Tex.App.-Dallas 2006, pet. denied) (plaintiff illegally took documents from dumpster, and so could not sue for fraud, conversion, or recovery of those documents); Ward v. Emmett, 37 S.W.3d 500, 502 (Tex.App.-San Antonio 2001, no pet.) (plaintiff, who had longstanding mental and behavioral problems and was eventually convicted of killing her mother, could not pursue claims against her health care providers; her injuries were deemed caused by her illegal conduct); Dover v. Baker, Brown, Shannon & Parker, 859 S.W.2d 441, 451 (Tex.App.-Houston [1st Dist.] 1993, no writ) (public policy barred recovery when plaintiff was a knowing and willful party to tax fraud which contributed to his injury).
     
      
      . Brief of Amicus Curiae Texas Civil Rights Project in Support of Respondents. Compare Carcamo-Lopez v. Doe, 865 F.Supp.2d 736, 766-767 (W.D.Tex.2011) (citing the court of appeals’ opinion in the present case to conclude that Texas' unlawful acts doctrine does not bar suit by an undocumented alien accidentally struck by a border patrol vehicle while crouching in the dark in vegetation near the bank of the Rio Grande River), with Rico v. Flores, 481 F.3d 234, 243-244 (5th Cir.2007) (concluding that it was uncertain whether the Texas unlawful acts doctrine would bar suit for the wrongful death of undocumented aliens who died in a railcar while entering the country illegally against the person hired to help them or the railway), and Fuentes v. Alecio, Civil Action No. C-06-425, 2006 U.S. Dist. LEXIS 93013, 2006 WL 3813780 (S.D.Tex. Dec. 26, 2006) (dismissing action for the wrongful death of an undocumented alien who expired from heat exhaustion while entering the country illegally as barred by the unlawful acts doctrine).
     
      
      
        . See, e.g., Bosworth v. Inhabitants of Swansey, 51 Mass. 363 (1845) (barring an action by an injured plaintiff illegally traveling on a Sunday); Hinckley v. Inhabitants of Penobscot, 42 Me. 89 (1856) (barring an action for injuries to a plaintiff’s horse caused by a defective highway because plaintiff was illegally traveling during daylight hours on a Sunday).
     
      
      . Olmstead v. United States, 277 U.S. 438, 483-484, 48 S.Ct. 564, 72 L.Ed. 944 (1928) (Brandeis, J., dissenting) (footnotes omitted).
     