Second-Degree Murder Lawyers in San Diego (PC 189)

Second-degree murder carries 15 years to life in state prison. Firearm enhancements can push that to 40 years to life or more. Our San Diego defense lawyers fight to reduce charges and protect your freedom. Call 24/7.

A second-degree murder charge in San Diego changes everything overnight. The weight of it is crushing, and the uncertainty about what comes next can feel paralyzing. We get it.

The circumstances that lead to murder charges are rarely black and white. A confrontation that spiraled out of control in seconds. A tragic accident that prosecutors are treating as something far more sinister. A DUI with a devastating outcome that the DA’s office is now calling murder. A false accusation from a co-defendant looking to shift blame.

Charges are accusations, not convictions. The prosecution still has to prove every element beyond a reasonable doubt, and that is a high bar, especially in second-degree murder cases where the mental state required for conviction is often the most fiercely contested element of all.

The fear, the stress, the overwhelming nature of facing a charge that carries 15 years to life: it’s all understandable, as is to be expected. But what matters now is the defense you build.

At David P. Shapiro Criminal Defense Attorneys, we’ve defended clients charged with homicide throughout San Diego County. As experienced San Diego violent crimes defense lawyers, we’ve taken murder cases from investigation through jury verdict, and we’ve achieved not guilty verdicts in cases others said were unwinnable. We know how to fight these cases at the highest levels, and we know how to identify the path that gives you the best possible outcome, whether that’s an acquittal, a reduction to manslaughter, or another resolution the facts support.

The prosecution is already building their case. Every day without representation is a day they work unopposed.

Quick Reference: PC 189 Second-Degree Murder

Classification	Felony (always)
Second-Degree Murder (base)	15 years to life in state prison
Victim Was a Peace Officer	25 years to life in state prison
Prior Murder Conviction	Life without the possibility of parole (LWOP)
Firearm Enhancement (use)	+10 years consecutive
Firearm Enhancement (discharge)	+20 years consecutive
Firearm Enhancement (GBI/death)	+25 years to life consecutive
Strike Offense	Yes, serious and violent felony
Additional	No statute of limitations; limited (if any) custody credits

What Is Second-Degree Murder Under California Law?

California Penal Code Section 187 defines murder as “the unlawful killing of a human being, or a fetus, with malice aforethought.”¹ Penal Code Section 189 then divides murder into two degrees. First-degree murder covers killings that were willful, deliberate, and premeditated, along with killings committed by specific means (poison, lying in wait, torture) or during the commission of certain dangerous felonies.²

All other kinds of murders are of the second degree.³

What does that mean in practice? Well, second-degree murder is the charge prosecutors bring when they believe the killing involved malice aforethought but was not planned in advance. It’s the “catch-all” murder charge, and it covers a wide range of factual scenarios.

The critical concept here is malice aforethought, which is the mental state that separates murder from manslaughter. Malice can be either express or implied:⁴

Express malice exists when you specifically intended to kill another person, but you acted impulsively, without premeditation or deliberation. A heat-of-the-moment shooting where the intent to kill exists but there was no prior planning is a common example.

Implied malice is more nuanced, and it’s the theory prosecutors rely on in many second-degree murder cases. Implied malice exists when you intentionally committed an act, the natural and probable consequences of that act were dangerous to human life, you knew the act was dangerous to human life, and you deliberately acted with conscious disregard for that danger.⁵ You didn’t necessarily intend to kill anyone, but your actions were so dangerous and you were so aware of that risk that the law treats the resulting death as murder.

Why does the distinction matter for your defense? Because the type of malice alleged determines which defense strategies are available, and which ones give you the strongest chance at a favorable outcome.

What Must the Prosecution Prove?

To convict you of second-degree murder, the prosecution must prove ALL of the following elements beyond a reasonable doubt:⁶

1. You committed an act that caused the death of another person.

The prosecution has to establish that your actions actually caused someone’s death. This includes both direct causation and what the law calls “proximate cause,” meaning the death was a natural and probable consequence of what you did. In some cases, causation is straightforward. In others, there are real questions about whether your actions truly caused the death or whether intervening factors played a role.

2. When you acted, you had a state of mind called malice aforethought.

This is where the battle is fought in most second-degree murder cases. The prosecution must prove either express malice (that you intended to kill) or implied malice.

For implied malice, they need to show all four sub-elements: (a) you intentionally committed an act; (b) the natural consequences of that act were dangerous to human life; (c) at the time, you knew the act was dangerous to human life; and (d) you deliberately acted with conscious disregard for human life.⁷

That’s a lot of elements within one element. Each of those sub-elements is something we can, and will, challenge if the facts support a position to do so.

3. You killed without lawful justification or excuse.

If you acted in legitimate self-defense or defense of another person, the killing was lawful. Not murder. Maybe not even manslaughter. The prosecution has to disprove self-defense beyond a reasonable doubt once we raise it.

The burden is on them to prove all of this. Beyond a reasonable doubt. That’s the highest standard in our legal system, and every element is a potential avenue for defense.

The Manslaughter Spectrum: Why the Degree of the Charge Matters Enormously

One of the most important things to understand about a second-degree murder charge is where it sits on the spectrum of homicide offenses, because the differences in sentencing are staggering.

From Murder to Manslaughter: What Moves a Case Up or Down

The same set of facts can support very different charges depending on the mental state the prosecution can prove:

Involuntary manslaughter (PC 192(b)) applies when a killing results from criminal negligence rather than a conscious disregard for life. There’s no malice. The sentence is 2, 3, or 4 years in state prison.⁸

Voluntary manslaughter (PC 192(a)) applies when a killing occurs in the heat of passion after legally adequate provocation, or when the defendant honestly but unreasonably believed in the need for self-defense (imperfect self-defense). The malice is negated. The sentence is 3, 6, or 11 years in state prison.⁹

Second-degree murder requires malice aforethought, express or implied, without premeditation. The sentence is 15 years to life.¹⁰

First-degree murder requires premeditation and deliberation (or killing by enumerated means, or felony murder). The sentence is 25 years to life.¹¹

For all intents and purposes, the difference between second-degree murder and voluntary manslaughter is the difference between 15 years to life and a maximum of 11 years. That’s not a technicality. That’s the rest of your life.

Provocation: The Bridge Between First and Second Degree

Here’s a nuance most people don’t know about. Provocation operates on two levels in California murder law:

Level 1 (CALCRIM No. 522): Provocation that caused the defendant to act rashly and without deliberation can reduce first-degree murder to second-degree murder.¹² The provocation does not need to be enough to cause a “reasonable person” to lose control. It just needs to be enough to negate premeditation.

Level 2 (CALCRIM No. 570): Provocation sufficient to cause a reasonable person to act rashly and without due deliberation, combined with the defendant actually killing under the influence of intense emotion before a reasonable cooling-off period, reduces murder to voluntary manslaughter.¹³

This two-tiered system means provocation can work as a defense even when it doesn’t fully eliminate the murder charge. Reducing first-degree to second-degree is itself a significant outcome. And reducing second-degree murder to voluntary manslaughter can mean the difference between decades in prison and a sentence measured in single-digit years.

Watson Murder: When a DUI Becomes a Murder Charge

This one surprises a lot of people. If you’ve previously been convicted of DUI and received what’s called a “Watson advisement,” a warning about the dangers of driving under the influence, a subsequent DUI that kills someone can be charged as second-degree murder.¹⁴

Why? Because that prior advisement is treated as evidence that you subjectively knew driving under the influence was dangerous to human life. That knowledge, combined with the decision to drive drunk anyway, establishes implied malice.

The prosecution typically proves subjective awareness through prior DUI convictions, completion of DUI education classes (where the Watson advisement is given), prior accidents while intoxicated, or extreme levels of intoxication combined with dangerous driving behavior.

Watson murder cases are heavily prosecuted in San Diego County. The DA’s office takes an aggressive posture on these cases, and they carry the same 15-years-to-life sentence as any other second-degree murder. Those facing this specific type of charge should understand how DUI murder under PC 187 is prosecuted and defended.

Penalties and Consequences

Let’s be real about something: second-degree murder carries some of the harshest penalties in California law. Understanding exactly what you’re facing is essential.

Prison Sentences

Charge	Sentence
Second-Degree Murder (base)	15 years to life
Victim was a peace officer	25 years to life
Prior murder conviction	Life without parole (LWOP)

What Does “15 Years to Life” Actually Mean?

This is one of the most misunderstood sentences in California law. An indeterminate sentence of 15 years to life does not mean you serve 15 years and go home. Here’s what actually happens:

You will serve a minimum of 15 years in state prison before you are even eligible for a parole hearing.¹⁵ At that hearing, the Board of Parole Hearings must find you suitable for release. If the board denies parole, you remain incarcerated and receive another hearing years later. Many second-degree murder defendants serve 20, 25, or 30 years or more before being found suitable for parole. Some are never found suitable.

There are two exceptions worth knowing about. Under PC 3051, defendants who committed the offense before age 26 may be eligible for a youth offender parole hearing after 20 or 25 years.¹⁶ Under PC 3055, defendants aged 50 or older who have served at least 20 years may be eligible for elderly parole consideration.¹⁷

Sentencing Enhancements: How the Numbers Stack

Now here’s where it gets even more serious. Murder sentences can be dramatically increased by enhancements served consecutively, meaning they’re added on top of the base sentence:

Firearm use (PC 12022.53, the “10-20-Life” law): Personally using a firearm adds 10 years. Personally discharging a firearm adds 20 years. Causing great bodily injury or death with a firearm adds 25 years to life.¹⁸

So you can see how these things snowball. Second-degree murder (15 to life) plus personal discharge of a firearm causing death (25 to life) equals 40 years to life before parole eligibility. That’s the practical reality of enhancement stacking.

Gang enhancement (PC 186.22): If the murder was committed for the benefit of a criminal street gang, that can add a 15-year minimum parole eligibility period on top of the life term.¹⁹

Prior serious felony (PC 667(a)(1)): A prior serious felony conviction adds 5 years consecutive.²⁰

Strike Offense

Second-degree murder is classified as both a “serious” and “violent” felony under California’s Three Strikes Law.²¹ A strike changes everything, not just for this case, but for the rest of your life.

A murder conviction counts as a strike on your record. If you already have a prior strike, any subsequent felony sentence is presumptively doubled. A third strike can result in 25 years to life. And you must be prepared to serve at least 85% of your sentence before becoming eligible for parole, with limited (if any) custody credits.²²

No Statute of Limitations

Unlike most crimes, murder has no statute of limitations in California.²³ You can be charged with murder decades after the alleged killing occurred. Cold cases are regularly reopened as new evidence emerges, witnesses come forward, or DNA and forensic technology advances.

Defense Strategies for Second-Degree Murder Charges

Here’s the critical point: second-degree murder charges are defensible. The question is identifying the right defense strategy based on the specific facts of your case and then executing that strategy with preparation, professionalism, and precision.

Many lawyers, based on inexperience, indifference, and/or outright incompetence, will just try to negotiate a plea right out of the gate. The reality of the situation is that these cases require a thorough investigation and strategic analysis before you know what your best options are.

Self-Defense or Defense of Others

California law recognizes your right to defend yourself or others from imminent harm.²⁴ If you reasonably believed you or someone else faced immediate danger of being killed or suffering great bodily injury, and you used only the force necessary to defend against that danger, the killing was lawful. That’s a complete defense. Full acquittal.

California follows the Castle Doctrine: you have no duty to retreat from your own home before using deadly force against an intruder.

Even if your belief in the need for self-defense was honest but unreasonable (what we call “imperfect self-defense”), that can reduce murder to voluntary manslaughter.²⁵ That’s the difference between 15 years to life and 3, 6, or 11 years. A huge difference.

Heat of Passion

If you killed in the heat of passion after being provoked in a way that would cause a reasonable person to act rashly and without deliberation, and you actually acted under the influence of intense emotion before a reasonable cooling-off period, the charge should be reduced from murder to voluntary manslaughter.²⁶

The prosecution bears the burden of proving malice beyond a reasonable doubt. Heat of passion negates malice. If we can establish that provocation triggered an intense emotional reaction, the murder charge cannot stand.

Challenging Implied Malice

In implied malice cases, including Watson DUI murders, the prosecution must prove you subjectively knew your conduct was dangerous to human life.²⁷ This is not an objective standard. It’s not enough for the prosecution to show that a reasonable person would have known the conduct was dangerous. They have to prove that you, personally, knew it.

We challenge this element by examining:

Whether you actually understood the risk, as opposed to being merely reckless. The reliability of any prior Watson advisements (did you genuinely understand them, or were they buried in paperwork you signed without reading?). Whether your mental state at the time precluded conscious disregard. Expert testimony on the effects of substances, mental health conditions, or cognitive limitations on awareness.

This is an area where the depth of the defense investigation makes an enormous difference. Toxicology reports, mental health evaluations, neuropsychological testing, and social history can all be used to challenge the prosecution’s malice theory.

Lack of Malice: Reduction to Involuntary Manslaughter

If the killing resulted from criminal negligence rather than a conscious disregard for life, the appropriate charge is involuntary manslaughter, not murder.²⁸ The distinction hinges on whether you were aware of the danger your conduct posed. Criminal negligence means you should have known. Implied malice means you did know and acted anyway.

That distinction is the difference between a determinate sentence of 2, 3, or 4 years and an indeterminate sentence of 15 years to life.

Voluntary Intoxication

Under California law, voluntary intoxication can negate express malice (the specific intent to kill) but cannot negate implied malice.²⁹ This defense is most effective in cases charged under an express malice theory, where it can potentially reduce murder to voluntary manslaughter.

In Watson DUI cases, intoxication is essentially the basis of the charge, so this defense is generally not available in that context.

False Accusation, Mistaken Identity, and Insufficient Evidence

People are, have been, and unfortunately will continue to be wrongfully accused of murder. Eyewitness identification, especially cross-racial identification, is notoriously unreliable. Decades of research confirm this.

In cases with disputed identity (gang shootings, drive-by situations, multi-party altercations), we scrutinize every piece of identification evidence: eyewitness accounts, surveillance footage, DNA and forensic evidence chain of custody, cell phone and GPS location data, alibi witnesses, and the adequacy of the law enforcement investigation.

Sometimes the strongest defense is proving you simply weren’t the person who committed the act.

Constitutional Violations

Evidence obtained in violation of your constitutional rights may be suppressed, meaning the jury never sees it.

We examine whether police conducted an illegal search or seizure, whether your Miranda rights were violated during questioning, whether your right to counsel was denied, and whether due process was violated at any stage of the investigation or prosecution. Suppressing key evidence can fundamentally change the strength of the prosecution’s case.

SB 1437 Resentencing (Post-Conviction)

For defendants already convicted of second-degree murder under a felony murder theory or the natural and probable consequences doctrine, Senate Bill 1437 provides a mechanism to petition for resentencing under PC 1172.6.³⁰ If the defendant could not be convicted of murder under the current law, the conviction may be vacated and the defendant resentenced on a lesser offense.

Many people across California have come home as a result of SB 1437 after serving decades in prison. If you or a loved one was convicted under one of these now-narrowed theories, this may be an option worth exploring.

Related Charges: Understanding the Differences

Second-degree murder doesn’t exist in a vacuum. Understanding how it relates to other homicide charges helps you see where the defense opportunities are.

Offense	Statute	Key Distinction	Sentence
First-Degree Murder	PC 187/189	Requires premeditation and deliberation (or enumerated means/felony murder)	25 years to life
Second-Degree Murder	PC 187/189	Malice aforethought without premeditation	15 years to life
Voluntary Manslaughter	PC 192(a)	Killing in heat of passion or imperfect self-defense; no malice	3, 6, or 11 years
Involuntary Manslaughter	PC 192(b)	Killing with criminal negligence; no malice	2, 3, or 4 years
Gross Vehicular Manslaughter While Intoxicated	PC 191.5(a)	DUI killing without implied malice (alternative to Watson murder)	4, 6, or 10 years

Prosecutors often charge first-degree murder with second-degree as a fallback, knowing the jury may find malice but reject premeditation. Defense strategy frequently focuses on moving the case down this spectrum, from murder to manslaughter, where the sentencing difference is measured in decades.

Facing Second-Degree Murder Charges in San Diego?

Second-degree murder cases often come down to what was going on in your mind at the moment of the act, and whether the prosecution can prove the specific mental state the law requires. We’ve defended clients charged with homicide throughout San Diego County, from express malice cases to Watson DUI murders to situations where our client was wrongly accused entirely. We know how the San Diego DA’s homicide unit prosecutes these cases, and we know how to challenge their theories at every stage. Our attorneys will actually take cases to a jury when that’s what the facts demand.

Time matters. Early action creates options that disappear later. Evidence fades. Witnesses forget. The window for the strongest defense is now.

Call us 24/7 for a consultation. We’ll review your case, explain what you’re actually facing, and start building your defense immediately. The bottom line is this: the prosecution’s version is not the only version. You are entitled to a defense that matches the seriousness of what you’re facing.

References

1. 1. Penal Code, § 187, subd. (a) [“Murder is the unlawful killing of a human being, or a fetus, with malice aforethought.”]↑ Penal Code, § 187, subd. (a) [“Murder is the unlawful killing of a human being, or a fetus, with malice aforethought.”]
2. 2. Penal Code, § 189 [Degrees of murder; all murder not of the first degree is of the second degree].↑ Penal Code, § 189 [Degrees of murder; all murder not of the first degree is of the second degree].
3. 3. Penal Code, § 189 [Degrees of murder; all murder not of the first degree is of the second degree].↑ Penal Code, § 189 [Degrees of murder; all murder not of the first degree is of the second degree].
4. 4. Penal Code, § 188 [Malice, express and implied, defined].↑ Penal Code, § 188 [Malice, express and implied, defined].
5. 5. Penal Code, § 188 [Malice, express and implied, defined].↑ Penal Code, § 188 [Malice, express and implied, defined].
6. 6. See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].↑ See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].
7. 7. See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].↑ See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].
8. 8. Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].↑ Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].
9. 9. Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].↑ Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].
10. 10. Penal Code, § 190 [Punishment for murder].↑ Penal Code, § 190 [Punishment for murder].
11. 11. Penal Code, § 190 [Punishment for murder].↑ Penal Code, § 190 [Punishment for murder].
12. 12. See CALCRIM No. 522 [Provocation: Effect on Degree of Murder].↑ See CALCRIM No. 522 [Provocation: Effect on Degree of Murder].
13. 13. See CALCRIM No. 570 [Voluntary Manslaughter: Heat of Passion].↑ See CALCRIM No. 570 [Voluntary Manslaughter: Heat of Passion].
14. 14. People v. Watson (1981) 30 Cal.3d 290.↑ People v. Watson (1981) 30 Cal.3d 290.
15. 15. Penal Code, § 190 [Punishment for murder].↑ Penal Code, § 190 [Punishment for murder].
16. 16. Penal Code, § 3051 [Youth offender parole hearings].↑ Penal Code, § 3051 [Youth offender parole hearings].
17. 17. Penal Code, § 3055 [Elderly parole program].↑ Penal Code, § 3055 [Elderly parole program].
18. 18. Penal Code, § 12022.53 [Enhancement for personal use of firearm during commission of specified felonies].↑ Penal Code, § 12022.53 [Enhancement for personal use of firearm during commission of specified felonies].
19. 19. Penal Code, § 186.22 [Participation in criminal street gang; enhancement of sentence].↑ Penal Code, § 186.22 [Participation in criminal street gang; enhancement of sentence].
20. 20. Penal Code, § 667, subd. (a)(1) [Prior serious felony conviction enhancement].↑ Penal Code, § 667, subd. (a)(1) [Prior serious felony conviction enhancement].
21. 21. Penal Code, § 667.5, subd. (c) [Definition of violent felony]; Penal Code, § 1192.7, subd. (c) [Definition of serious felony].↑ Penal Code, § 667.5, subd. (c) [Definition of violent felony]; Penal Code, § 1192.7, subd. (c) [Definition of serious felony].
22. 22. Penal Code, § 2933.1 [Violent felony custody credit limitation].↑ Penal Code, § 2933.1 [Violent felony custody credit limitation].
23. 23. Penal Code, § 799 [No limitation for offenses punishable by death or life imprisonment].↑ Penal Code, § 799 [No limitation for offenses punishable by death or life imprisonment].
24. 24. See CALCRIM No. 505 [Justifiable Homicide: Self-Defense or Defense of Another].↑ See CALCRIM No. 505 [Justifiable Homicide: Self-Defense or Defense of Another].
25. 25. See CALCRIM No. 571 [Voluntary Manslaughter: Imperfect Self-Defense].↑ See CALCRIM No. 571 [Voluntary Manslaughter: Imperfect Self-Defense].
26. 26. See CALCRIM No. 570 [Voluntary Manslaughter: Heat of Passion].↑ See CALCRIM No. 570 [Voluntary Manslaughter: Heat of Passion].
27. 27. See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].↑ See CALCRIM No. 520 [First or Second Degree Murder With Malice Aforethought].
28. 28. Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].↑ Penal Code, § 192 [Manslaughter; voluntary, involuntary, and vehicular].
29. 29. See CALCRIM No. 625 [Voluntary Intoxication: Effects on Homicide Crimes].↑ See CALCRIM No. 625 [Voluntary Intoxication: Effects on Homicide Crimes].
30. 30. Penal Code, § 1172.6 [Resentencing for persons convicted of murder under felony murder or natural and probable consequences theory].↑ Penal Code, § 1172.6 [Resentencing for persons convicted of murder under felony murder or natural and probable consequences theory].