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Second Degree Murder Charges in Arizona?
Every Day Counts.
Second degree murder is a Class 1 felony in Arizona that carries a lengthy prison sentence even for someone with no prior record. Because the line between second degree murder and manslaughter often turns on intent and provocation, we recommend you promptly speak to a criminal defense attorney experienced in handling homicide cases in Maricopa County.
One word separates second degree murder from a capital charge: premeditation. Under ARS 13-1104, second degree murder covers killings that were intentional or knowing but not planned, along with a third category that requires no intent to kill at all. It is still a Class 1 felony, and it still carries a mandatory prison term with no probation available, but it removes the death penalty and natural life from the table.
That makes second degree murder the destination in a large share of Arizona homicide defenses. A defendant charged with first degree murder who defeats premeditation lands here, trading a possible death sentence for a range that tops out at 25 years. A defendant charged with second degree murder who establishes adequate provocation drops to manslaughter. Where a case sits on that ladder is the whole fight.
Matthew Lopez Law defends second degree murder charges across Arizona. Contact our firm for a confidential consultation.
A person commits second degree murder if, without premeditation, any of the following applies.
Intentional killing. The person intentionally causes the death of another person. The intent to kill is present; the planning and reflection are not.
Knowing killing. Knowing that the conduct will cause death or serious physical injury, the person causes the death of another. Note the reach here: the state does not have to prove the defendant knew death would result, only death or serious physical injury.
Extreme indifference. Under circumstances manifesting extreme indifference to human life, the person recklessly engages in conduct that creates a grave risk of death and thereby causes the death of another. This theory requires no intent to kill and no knowledge that death would follow. It is sometimes called depraved-mind murder, and it is how the state charges cases like firing into an occupied building or a fatal high-speed crash where the driving was egregious.
Each theory also applies to the death of an unborn child, subject to the statutory exceptions for authorized medical care and for the mother.
Second degree murder has its own sentencing statute, ARS 13-710, rather than following the general felony grid.
| First-Offense Term | Length |
| Minimum | 10 years |
| Presumptive | 16 years |
| Maximum | 25 years |
Probation and suspended sentences are not available. A defendant with historical prior felony convictions faces a substantially increased range, and when the victim is under 15 years of age, sentencing shifts to the dangerous crimes against children framework under ARS 13-705.
Because the presumptive term sits at 16 years, closer to the maximum than the minimum, mitigation work matters enormously. Every year argued off the presumptive term is a year of a client’s life.
The third theory is the one that surprises defendants most. A person with no intention of harming anyone can face second degree murder if the state characterizes their conduct as recklessness plus extreme indifference to human life.
This theory drives many Arizona fatal-crash prosecutions. Arizona has no dedicated vehicular homicide statute, so a fatal collision gets charged somewhere on the general homicide ladder. A DUI crash prosecuted as manslaughter carries a 7 to 21 year dangerous range. The same crash charged as second degree murder under the extreme indifference theory carries 10 to 25 years. Whether the driving crossed from recklessness into extreme indifference is a question of degree that defense experts and accident reconstruction can genuinely contest.
Arizona courts treat extreme indifference as requiring more than the recklessness that supports manslaughter. Establishing that the conduct was reckless but not extreme is a direct route to the lower charge.
Reduce to manslaughter through provocation. Evidence of a sudden quarrel or heat of passion on adequate provocation converts a murder charge into manslaughter, dropping the exposure from a 10 year floor to a range that can include probation in a non-dangerous case.
Attack the mental state. Each theory has a distinct mental element. Showing the conduct was reckless rather than knowing, or negligent rather than reckless, moves the charge down the ladder toward negligent homicide.
Justification. Self-defense and defense of others under ARS 13-404 and ARS 13-405 are complete defenses. Arizona places the burden on the state to disprove justification beyond a reasonable doubt once it is properly raised, which is a meaningful advantage.
Causation. The state must prove the defendant’s conduct caused the death. Intervening medical care, pre-existing conditions, and alternative causes are all legitimate grounds for expert challenge, particularly where the death occurred well after the incident.
Cause and manner of death. Independent forensic pathology review of the autopsy findings frequently identifies alternative explanations or undermines the state’s timeline.
Intoxication and capacity. Voluntary intoxication does not excuse conduct in Arizona, but evidence of impairment, mental illness, or cognitive limitation can defeat the specific mental states the statute requires.
Identification and forensics. DNA, ballistics, digital location records, and eyewitness identification each carry known error rates and are subject to challenge through independent examination.
| Charge | Mental State | Class | First-Offense Range |
| First degree murder | Premeditated, or felony murder | Class 1 | Death, natural life, or life with release after 25 years |
| Second degree murder | Intentional or knowing without premeditation, or extreme indifference | Class 1 | 10 to 25 years, presumptive 16 |
| Manslaughter | Reckless, or heat of passion | Class 2 | 3 to 12.5 years non-dangerous; 7 to 21 dangerous |
| Negligent homicide | Criminal negligence | Class 4 | Up to 3.75 years non-dangerous; 4 to 8 dangerous |
Reading down this table is how a defense strategy gets built. Every step down represents years, and in the case of first degree murder, potentially a life.
Under ARS 13-107(A), a prosecution for any homicide may be commenced at any time. Second degree murder charges are filed years or decades after a death, often when new forensic testing revives a cold case or a witness comes forward.
Second degree murder cases are won and lost on mental state. Whether the conduct was premeditated, knowing, reckless, or negligent determines a range that runs from probation eligibility to 25 years, and that determination depends on evidence a defense team develops early through expert review and independent investigation.
We serve clients in Tempe, Mesa, Apache Junction, Lake Havasu, Parker, and statewide. Every interaction confidential.
Contact us for a free consultation.
Every minute counts when you’re facing criminal charges in Arizona. Whether you were just arrested or have court next week, our team is ready to start building your defense right now. We offer free consultations and can start protecting your rights today with flexible payment plans that work for your budget.
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