No — under U.S. law, you cannot consent to murder in any way that shields the person who kills you from criminal liability. Every state treats homicide as a crime against the public order, not just an injury to the victim, so the victim’s agreement, request, or written permission does not excuse the killing. A person who takes another’s life on request still faces a homicide charge.
Why Consent Doesn’t Excuse a Killing
Homicide law protects an interest the individual victim cannot waive. The harm reaches past the person killed to their family, their community, and the legal order itself, and courts have long refused to let private agreements override that.
The Model Penal Code, which has shaped criminal statutes across most states, draws the line explicitly. Under Section 2.11, consent operates as a defense to conduct causing bodily injury only when the injury is “not serious,” or when it is a foreseeable hazard of a lawful athletic contest or competitive sport. Death is the most serious harm the law recognizes, so it sits well outside any zone where consent has legal effect. No state has carved out an exception permitting a person to consent to their own killing.
The reasoning is practical as well as principled. If consent could excuse a homicide, the door would open to coerced “agreements” from vulnerable people, to financial motives dressed up as mercy, and to an impossible task for investigators trying to verify what someone who is now dead actually wanted. Legislatures and courts have concluded the risks are not worth any theoretical benefit.
Where Consent to Physical Harm Actually Works
Consent does have a real role in a few contexts involving physical harm. Understanding where it stops matters, because it never stretches far enough to cover a killing.
Contact Sports
Organized contact sports like boxing and football are the clearest place consent operates. A player who takes the field or steps into the ring implicitly agrees to the physical contact the rules permit, and injuries within the normal scope of the game do not produce criminal charges. That consent has firm limits. It covers foreseeable contact allowed by the rules, not deliberate attempts to cause serious injury. A boxer who lands a legal punch that happens to kill an opponent stands in a fundamentally different legal position from a fighter who keeps striking an unconscious person. Nothing about entering a sport eliminates liability where a participant intentionally uses the setting to kill.
Mutual Combat
Some jurisdictions recognize “mutual combat” in a narrow form, typically covering two people who agree to a fistfight without weapons and without hurting bystanders. Where the doctrine exists, it applies to minor assault cases. It does not reach fights involving deadly weapons, and it does not excuse a killing. If a consensual fight ends in death, the survivor faces homicide charges like anyone else. Several states expressly reject mutual combat as a justification for the use of force.
Dueling
Dueling has been illegal in the United States since the founding, criminalized first under English common law and then by specific anti-dueling statutes, some still on the books. The fact that both participants agreed has never worked as a defense to the killing that resulted. The state’s interest in preserving life overrides the private agreement to risk it.
Medical Aid in Dying: The One Narrow Legal Path
Medical aid in dying is the closest the law comes to letting a person choose death with legal protection for anyone who helps. The distinction from homicide is precise: the dying person must perform the final act themselves.
Under these laws, a physician prescribes lethal medication to a terminally ill patient, and the patient self-administers it. The doctor’s role ends at the prescription. That self-administration requirement is what keeps the practice out of homicide territory. As of 2026, more than a dozen states and the District of Columbia have authorized medical aid in dying, with the most recent additions taking effect in 2025 and 2026.
Eligibility is tightly controlled. Details vary, but the laws generally require a terminal diagnosis with a prognosis of six months or less, multiple oral requests separated by a waiting period, a written request witnessed by at least two people, confirmation of the diagnosis and prognosis by a second physician, and a finding that the patient is mentally competent. A psychological evaluation is required if either physician suspects impaired judgment.
The U.S. Supreme Court addressed the constitutional question in Washington v. Glucksberg, holding that the Due Process Clause does not protect a right to commit suicide or to receive assistance in doing so. The Court found Washington State’s ban on assisted suicide rationally related to the state’s legitimate interest in protecting medical ethics and preserving human life. The decision left states free to legalize the practice through their own legislatures, which more than a dozen have done since.1Justia. Washington v. Glucksberg, 521 U.S. 702 (1997)
Active Euthanasia vs. Withdrawing Treatment
Two practices often get confused with medical aid in dying. They sit on opposite sides of the legal line.
Active Euthanasia Is Illegal in Every State
Active euthanasia means a third party, usually a medical professional, directly administers a lethal substance to end a patient’s life. It is illegal in all 50 states, even with the patient’s explicit consent. The difference from medical aid in dying is who performs the final act. When a doctor injects a lethal dose rather than handing over a prescription, the law treats the death as a homicide. The patient’s consent, the doctor’s compassionate motive, and the severity of the suffering do not change that classification. Some countries permit active euthanasia under controlled conditions; the United States does not.
Withdrawing Life Support Is a Recognized Right
Refusing or withdrawing life-sustaining treatment is a different matter. In Cruzan v. Director, Missouri Department of Health, the Supreme Court recognized that a competent person has a constitutionally protected liberty interest in refusing lifesaving medical treatment, including hydration and nutrition.2Legal Information Institute. Cruzan v. Director, DMH, 497 U.S. 261 (1990) The law treats withdrawal of treatment as passive, allowing a natural process to proceed, rather than as an active intervention to cause death. When the Court later ruled on physician-assisted suicide in Glucksberg, it left this earlier right to refuse care undisturbed.3Constitution Annotated. Physician Assisted-Death and Substantive Due Process
The practical result: a family that directs doctors to remove a ventilator is exercising a recognized constitutional right. A family member who injects that same relative with a lethal substance is committing homicide, even if the patient asked for it. Everything turns on whether someone actively causes death or allows it to occur.
Mercy Killings Are Still Homicide
Ending the life of a suffering loved one out of compassion is legally a homicide. Administering a lethal dose to a terminally ill family member who begs for it is indistinguishable, in criminal law, from any other intentional killing. The victim’s request and the actor’s motive do not create a defense.
What those factors do affect is how the system responds. Prosecutors have wide discretion, and mercy killing cases often draw charges below first-degree murder. Voluntary manslaughter, which typically applies when a killing occurs under extreme emotional disturbance, is a common alternative. In some cases prosecutors have declined to file charges at all when the circumstances were sympathetic enough. Juries have been unpredictable: some convict on reduced charges, some acquit outright despite clear evidence of intent.
Sentencing tends to be lighter than in typical homicide cases. Judges frequently treat compassionate motive as a mitigating factor, producing probation, suspended sentences, or short prison terms rather than the decades-long sentences intentional killings usually carry. Lighter treatment is not legal protection. Anyone who acts on a loved one’s request to end their suffering takes an enormous legal risk, with the outcome hinging on the individual prosecutor, judge, and jury.
The Slayer Rule Blocks the Financial Angle
Criminal liability is not the only consequence. Every state, in some form, applies the slayer rule, which prevents a killer from inheriting property or collecting life insurance proceeds from the person they killed. The rule applies whenever the killing was intentional, regardless of whether the victim consented.
The rule exists precisely to close the scenario where a beneficiary and an insured “agree” to a killing that pays out. A criminal conviction for an intentional killing creates a conclusive presumption under the slayer rule, and the killer forfeits any interest in the victim’s estate, life insurance, or retirement accounts. Even without a conviction, a civil court can independently find the killing was intentional and apply the rule.
The legal system has anticipated the ways someone might try to use a victim’s consent to benefit from a killing and shut them down. Consent does not reduce the charge, does not serve as an affirmative defense, and does not preserve the killer’s financial interests. Life is not something the law lets a person bargain away.