Arizona homicide laws divide the unlawful killing of another person into four offenses: first-degree murder, second-degree murder, manslaughter, and negligent homicide. The charge turns on the defendant’s mental state at the time of the killing, and the penalties stretch from as little as one year in prison for negligent homicide up to natural life or the death penalty for first-degree murder.
First-Degree Murder
First-degree murder is the most serious homicide charge in the state. A person commits it by intentionally causing another’s death with premeditation, meaning they had time to reflect on the decision to kill, however briefly, before acting.
Arizona also treats certain deaths as first-degree murder even without premeditation. Under the felony murder rule, if someone dies during the commission of a listed serious felony, every participant in that felony can be charged with first-degree murder. Qualifying felonies include sexual assault, kidnapping, burglary, arson, robbery, child abuse, drug trafficking above statutory thresholds, escape, terrorism, and fleeing law enforcement in a vehicle.1Arizona Legislature. Arizona Code 13-1105 – First Degree Murder; Classification A getaway driver in an armed robbery where the clerk is killed faces the same first-degree murder charge as the person who fired the shot.
Sentencing depends on whether the state seeks the death penalty. If prosecutors file notice and the jury finds at least one aggravating circumstance proven beyond a reasonable doubt, the jury then chooses between death and a lesser sentence. When death is not sought or not imposed for premeditated murder, the sentence is natural life, meaning the person will never be released. For felony murder, the judge chooses between natural life and life imprisonment with a 25-year minimum before any parole eligibility. If the victim was under 15, that minimum rises to 35 years.2Arizona Legislature. Arizona Code 13-752 – Sentences of Death, Life Imprisonment or Natural Life
Second-Degree Murder
Second-degree murder covers intentional killings without premeditation. It also reaches killings where the defendant acted with such reckless disregard for human life that the conduct created a grave risk of death. The line against manslaughter is the degree of recklessness: second-degree murder requires extreme indifference to whether anyone lived or died.3Arizona Legislature. Arizona Code 13-1104 – Second Degree Murder; Classification
Second-degree murder is a Class 1 felony. For a first offense, the prison range runs from 10 to 25 years, with a presumptive sentence of 16 years. When the victim is under 15, the case falls under Arizona’s dangerous-crimes-against-children statute, with a 25-year minimum, a 30-year presumptive term, up to 35 years, and the possibility of life imprisonment.4Arizona Legislature. Arizona Code 13-705 – Dangerous Crimes Against Children; Sentences; Definitions The death penalty is not available for second-degree murder.
Manslaughter
Manslaughter is a killing committed under circumstances that reduce the defendant’s moral blame compared to murder. Arizona law identifies four situations that qualify:
- Recklessly causing another person’s death, where the recklessness falls short of the extreme indifference required for second-degree murder.
- Committing what would be second-degree murder in the heat of passion after adequate provocation by the victim, such as during a sudden quarrel.
- Killing under the threat of immediate deadly force that a reasonable person could not have resisted.
- Intentionally providing the physical means a person uses to end their own life, knowing their intent.
Manslaughter is a Class 2 felony. Charged as a dangerous offense, the presumptive first-offense sentence is 10.5 years with a range of 7 to 21 years.6Arizona Courts. Criminal Code Sentencing Provisions 2025-2026 A case counts as dangerous whenever it involves the use or threat of a deadly weapon or the intentional or knowing infliction of serious physical injury. Without that classification, the first-offense Class 2 range runs from 3 years mitigated to 12.5 years aggravated, with a 5-year presumptive term.7Arizona Legislature. Arizona Code 13-702 – First Time Felony Offenders; Sentencing; Definition
Negligent Homicide
Negligent homicide is the least serious homicide charge. It applies when a person causes death through criminal negligence, defined as failing to perceive a substantial and unjustifiable risk that amounts to a gross deviation from what a reasonable person would recognize.8Arizona Legislature. Arizona Code 13-105 – Definitions Fatal distracted-driving crashes and leaving a loaded firearm within a child’s reach are typical examples.
The offense is a Class 4 felony.9Arizona Legislature. Arizona Code 13-1102 – Negligent Homicide; Classification A first-time offender faces 1 year mitigated up to 3.75 years aggravated, with a 2.5-year presumptive term.7Arizona Legislature. Arizona Code 13-702 – First Time Felony Offenders; Sentencing; Definition Probation is possible, especially for defendants with no prior record. Charged as a dangerous offense, the range jumps to 4 to 8 years with a 6-year presumptive sentence.6Arizona Courts. Criminal Code Sentencing Provisions 2025-2026
What Moves the Sentence Within the Range
Except for first-degree murder, Arizona sentences aren’t fixed numbers. The court starts at the presumptive term and adjusts upward for aggravating circumstances or downward for mitigating ones.10Arizona Legislature. Arizona Code 13-701 – Sentence of Imprisonment for Felony; Presentence Report; Aggravating and Mitigating Factors
Common aggravating factors in homicide cases include use of a deadly weapon, the presence of an accomplice, a particularly vulnerable victim such as a child or elderly person, and emotional or physical harm beyond what the offense itself inflicted. The jury must find aggravating factors proven beyond a reasonable doubt before the court can impose a sentence above the presumptive term.
First-degree murder has its own separate set of aggravators that determine whether the death penalty is on the table, including a prior serious-offense conviction, an especially heinous or cruel killing, a victim under 15 or 70 or older, an on-duty peace officer victim, and killings committed to further gang activity or silence a witness.11Arizona Legislature. Arizona Code 13-751 – Sentence of Death or Life Imprisonment; Aggravating and Mitigating Circumstances
On the mitigation side, a first-degree murder defendant can present virtually any aspect of character, background, or offense circumstances. The statute specifically lists impaired capacity to appreciate wrongfulness, unusual and substantial duress, minor participation in a group offense, inability to foresee that conduct would cause death, and the defendant’s age. For other homicide offenses, courts weigh factors like a clean record, emotional distress at the time of the offense, cooperation with police, and genuine remorse.
Prior felony convictions push sentences up sharply. A defendant with one prior felony (category two) faces roughly double the presumptive sentence, and a defendant with two or more priors (category three) faces ranges that can triple or quadruple the first-offense term. Repeat offenders are also ineligible for probation or suspended sentences.12Arizona Legislature. Arizona Code 13-703 – Repetitive Offenders; Sentencing
Self-Defense
Self-defense is a complete justification in Arizona. If the jury accepts it, the result is an acquittal, not a reduced charge.
A person can use physical force when a reasonable person in the same situation would believe the force was immediately necessary to protect against another’s unlawful use of force. Deadly force is justified when a reasonable person would believe it immediately necessary to prevent the other person’s use of unlawful deadly force.13Arizona Legislature. Arizona Code 13-404 – Justification; Self-Defense The defense is not available against verbal provocation alone, to resist an arrest the person knows is being made by a police officer, or when the defendant initially provoked the confrontation, unless they clearly tried to withdraw and the other person kept attacking.
Arizona is a stand-your-ground state. A person has no duty to retreat before using deadly force, so long as they are somewhere they have a legal right to be and are not engaged in unlawful activity. That rule covers the home, vehicle, workplace, and anywhere else in the state the person may lawfully be.14Arizona Legislature. Arizona Code 13-411 – Justification; Use of Force in Crime Prevention Once the defense puts enough evidence into the record to raise self-defense, the prosecution must disprove it beyond a reasonable doubt.
Guilty Except Insane
Arizona does not use a traditional not-guilty-by-reason-of-insanity verdict. Defendants can instead be found guilty except insane. To qualify, the defendant must prove by clear and convincing evidence that at the time of the offense, they suffered from a mental disease or defect so severe that they did not know their actions were wrong.15Arizona Legislature. Arizona Code 13-502 – Insanity Test; Burden of Proof; Guilty Except Insane
The bar is high. Voluntary intoxication, personality disorders, impulse control disorders, and temporary emotional states like rage or jealousy do not count. A guilty-except-insane verdict is also not a release: the court calculates the prison sentence the defendant would otherwise have received, suspends it, and commits the person to a secure state mental health facility for that same length of time. The verdict does not count as a prior conviction for repeat-offender enhancements in later cases.
Consequences Beyond Prison
A homicide conviction carries weight long after the sentence is served.
Federal law bars anyone convicted of a crime punishable by more than one year of imprisonment from possessing firearms or ammunition for life.16Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Every Arizona homicide offense clears that threshold. Enforcement is aggressive: possession of even a single round as a convicted felon is a separate federal crime carrying up to 10 years, and defendants with three or more prior violent felony convictions face a 15-year mandatory minimum.
The victim’s family can also file a civil wrongful death action against the person responsible. Arizona law lets a surviving spouse, child, parent, guardian, or personal representative bring the suit.17Arizona Legislature. Arizona Code 12-612 – Parties Plaintiff; Recovery; Distribution Civil cases use a lower standard of proof than criminal ones, so an acquittal does not block a wrongful death claim. Recoverable damages typically cover lost income the deceased would have earned, funeral expenses, pre-death medical costs, and compensation for the survivors’ loss of companionship and emotional suffering.
A felony conviction also costs the defendant their voting rights during incarceration in Arizona, and makes employment, housing, and professional licensing significantly harder to obtain afterward.