First Degree Murder in California: Penalties and Defenses

First-degree murder in California is an unlawful killing committed with malice aforethought that also meets one of three additional conditions: it was willful, deliberate, and premeditated; it happened during one of several listed felonies; or it was carried out by a specified method such as poison, torture, or lying in wait.¹ The base sentence is 25 years to life in state prison, and when aggravating “special circumstances” are proven, the sentence becomes life without the possibility of parole or, in theory, death.²

What the Prosecution Has to Prove

Murder in California is the unlawful killing of a human being or a fetus with malice aforethought.³ Malice takes two forms. Express malice is an actual intent to kill. Implied malice is doing something so dangerous, with full awareness of the risk to human life, that the law treats it as the equivalent of intending to kill.⁴

Malice gets the prosecution to murder. It doesn’t get them to the first degree. For that, they must additionally prove premeditation and deliberation, a qualifying felony, or a listed method of killing. Each path stands on its own, and the prosecution only has to prove one.¹

Premeditation and Deliberation

The most common route to a first-degree charge is proving the killing was willful, deliberate, and premeditated. Willful means intentional. Premeditated means thought about beforehand. Deliberate means the defendant weighed the choice rather than acting on pure reflex.

How much time does that take? Very little. The statute expressly says the prosecution does not need to show the defendant reflected in a “mature and meaningful” way on the gravity of the act.¹ Seconds can be enough. Courts typically look at three things: planning behavior, a clear motive, and a manner of killing that suggests calculation. Bringing a weapon, luring the victim, or waiting until they are alone all build the circumstantial case.

Felony Murder After Senate Bill 1437

California overhauled its felony murder rule in 2019. Under the current law, a participant in a qualifying felony where someone dies can only be convicted of murder if one of three things is true:

They were the actual killer.
They were not the killer but intended to kill and aided the killer.
They were a major participant in the underlying felony and acted with reckless indifference to human life.

These conditions are set out in Penal Code section 189(e), and section 188 was amended to bar imputing malice to someone based solely on their participation in a crime.¹⁴ A getaway driver whose co-conspirator unexpectedly shoots someone can no longer be automatically convicted of murder.

The felonies that trigger the rule are listed in section 189(a): arson, rape, carjacking, robbery, burglary, mayhem, kidnapping, train wrecking, and several sex offenses. One important carve-out: when the victim is a peace officer killed in the line of duty, the narrowed rules do not apply and all participants in the underlying felony remain liable for murder.¹

People convicted of felony murder under the old, broader rule can petition to have that conviction vacated under Penal Code section 1172.6 (originally numbered 1170.95). At the resulting hearing the prosecution must prove beyond a reasonable doubt that the person would still be guilty under the reformed law; if it cannot, the murder conviction is vacated and the person is resentenced on any remaining counts.⁵

Killings That Are First Degree by Method

Certain methods are so inherently calculated that the statute treats them as first-degree murder on their own, without a separate premeditation showing. These include killing by poison, by lying in wait, and by torture. You don’t poison someone by accident.

The statute also elevates killings carried out with destructive devices or explosives, weapons of mass destruction, armor-piercing ammunition, and killings by intentionally firing from a motor vehicle at a person outside the vehicle with intent to kill.¹

How First Degree Differs From Second Degree

Any murder that does not fit within section 189’s first-degree categories is second-degree murder. Both degrees require malice, so both involve either an intent to kill or an act of extreme recklessness. The dividing line is planning.

A bar fight that escalates when someone grabs a bottle and swings without any prior plan is likely second-degree murder. The same defendant who leaves, retrieves a knife from his car, and comes back ten minutes later has crossed into first-degree territory.

Second-degree murder generally carries 15 years to life, roughly 10 years less at the minimum than the first-degree floor of 25 to life. That gap widens once special circumstances or enhancements enter the picture, because many of those provisions apply only to first-degree convictions. The degree of the murder is often the most fiercely contested question at trial.

The Base Sentence: 25 Years to Life

The default sentence for first-degree murder is 25 years to life in state prison.² The “to life” part matters. The 25 years is a floor. A defendant must serve at least that long before becoming eligible for a parole hearing, and good-time credits do not reduce this minimum term.⁶ Parole is discretionary. Many defendants serve well beyond 25 years.

Special Circumstances: Life Without Parole and the Death Penalty

When a first-degree murder is accompanied by an aggravating factor listed in Penal Code section 190.2, the sentence jumps to either life without the possibility of parole or death. The list runs to more than 20 categories and includes:

Murder for financial gain
Multiple murder convictions in the same proceeding
Killing a witness to prevent testimony
Murder by lying in wait
Murder involving torture
Murder motivated by the victim’s race, religion, or other protected characteristic
Murder committed during robbery, kidnapping, carjacking, rape, and other listed felonies

When a special circumstance is proven, the default sentence becomes life without parole, and the defendant will never appear before a parole board.⁷ The prosecution can also pursue the death penalty, which triggers a separate penalty phase where the jury weighs aggravating and mitigating factors.

No execution has taken place in California since 2006. In March 2019, Governor Gavin Newsom issued Executive Order N-09-19, imposing a moratorium on executions and ordering the closure of the execution chamber at San Quentin.⁸ The moratorium grants reprieves to everyone on death row but does not change their underlying sentences or release anyone.⁹ A future governor could lift the moratorium, so death remains a statutory sentencing option.

Firearm and Gang Enhancements

Additional prison time is stacked on top of the murder sentence when a firearm is involved. These enhancements run consecutively, after the base sentence:

Personally using a firearm during the offense: 10 additional years. The gun does not need to be loaded or functional.
Personally firing a firearm: 20 additional years.
Firing a firearm and causing death or great bodily injury: 25 years to life on top of the murder sentence.

These are set out in Penal Code section 12022.53.¹⁰ For a first-degree murder committed by shooting the victim, the combined exposure is effectively 50 years to life. Whether the trigger was actually pulled matters a great deal at sentencing: 10 years versus 20.

Gang enhancements pile on further. When a murder is committed for the benefit of, at the direction of, or in association with a criminal street gang, a life-sentence felony like murder carries a minimum of 15 years before parole eligibility under the gang enhancement, which extends the already lengthy minimum term.¹¹ Courts retain discretion to strike gang enhancements when the interests of justice require it.

Defendants Who Were Under 18

The death penalty is off the table for anyone who was under 18 at the time of the killing, under both California law and the U.S. Supreme Court’s decision in Roper v. Simmons. For defendants who were 16 or 17 at the time of a first-degree murder with special circumstances, the court has discretion to impose either life without parole or 25 years to life. It is not mandatory LWOP as it would be for an adult.¹²

The U.S. Supreme Court’s ruling in Miller v. Alabama reinforced this by holding that mandatory life-without-parole sentences for juvenile homicide offenders violate the Eighth Amendment. California also created youth offender parole hearings that allow people convicted of crimes committed before age 26 to seek earlier parole review.

Common Defenses

A first-degree murder charge is not the same as a conviction. Defenses aim at one of three targets: acquittal, reduction to a lesser offense, or mitigation at sentencing.

Self-Defense

California recognizes homicide as justifiable when a person kills to resist an attempt to murder them, to commit a felony against them, or to inflict great bodily harm, and it extends to defense of the home, family, and others where a reasonable person would perceive an imminent danger of serious violence.¹³ Reasonableness is the key requirement. A successful self-defense claim results in acquittal.

Imperfect Self-Defense

If the defendant honestly believed they were in imminent danger but that belief was objectively unreasonable, the killing is not justified but it also is not first-degree murder. Imperfect self-defense negates malice and reduces the offense to voluntary manslaughter, which carries 3, 6, or 11 years.¹⁴ Many murder trials are really fought over this question of state of mind.

Insanity

California’s insanity test is strict. The defense must prove by a preponderance of the evidence that, at the time of the act, the defendant was incapable of understanding the nature of what they were doing or of distinguishing right from wrong.¹⁵ Having a mental illness is not enough. A successful finding results in commitment to a state hospital rather than prison, potentially for an indefinite period.

Attacking Premeditation

Even when the killing itself is undisputed, undermining premeditation can drop the conviction from first-degree to second-degree murder and cut 10 years off the minimum. Evidence of intoxication, extreme emotional disturbance, or a chaotic, spontaneous confrontation can all do that work. Voluntary intoxication does not excuse the crime, but it can prevent the prosecution from proving the specific intent that first-degree premeditated murder requires.

1
California Legislative Information. California Penal Code 189
2
California Legislative Information. California Penal Code 190
3
California Legislative Information. California Penal Code PEN 187 – Murder
4
California Legislative Information. California Penal Code PEN 188 – Malice Aforethought
5
California Legislative Information. California Penal Code 1170.95
6
Westlaw. California Penal Code 190 – Punishment for Murder
7
California Legislative Information. California Penal Code PEN 190.2
8
State of California. Executive Order N-09-19
9
California Department of Corrections and Rehabilitation. California Capital Punishment
10
California Legislative Information. California Penal Code PEN 12022.53
11
California Legislative Information. California Penal Code PEN 186.22
12
California Legislative Information. California Penal Code PEN 190.5
13
California Legislative Information. California Penal Code PEN 197 – Justifiable Homicide
14
California Legislative Information. California Penal Code PEN 192
15
California Legislative Information. California Penal Code PEN 25