First, Second, and Third Degree Murder: Key Differences

First-degree murder requires premeditation and a deliberate intent to kill, making it the most serious charge. Second-degree murder is intentional but unplanned. Third-degree murder, recognized in only Florida, Minnesota, and Pennsylvania, is defined differently in each state and generally covers killings committed without an intent to kill.

The difference between first-degree, second-degree, and third-degree murder comes down to three factors: intent, premeditation, and the circumstances of the killing. Each degree carries different penalties, and the distinctions can mean the difference between a limited prison sentence and life without parole.

This guide explains how each degree is defined, which states recognize third-degree murder, how the felony murder rule works, and the penalty ranges across jurisdictions.

First-Degree Murder

First-degree murder is the most serious homicide charge. Under federal law (18 U.S.C. 1111), first-degree murder requires that the killing be "willful, deliberate, malicious, and premeditated."

What Premeditation Means

Premeditation does not require weeks or months of planning. Courts have held that premeditation can form in seconds, as long as the defendant had time to reflect on the decision to kill before acting. The key question is whether the defendant made a conscious decision to take a life, rather than acting on pure impulse.

How brief that reflection can be varies by state. Some jurisdictions accept a period measured in seconds, while others require meaningfully more than an instant. Check your state's pattern jury instructions for the standard a jury there would actually be given.

What Qualifies as First-Degree Murder

Most jurisdictions classify the following as first-degree murder:

• Premeditated killings: Any deliberate, planned killing with malice aforethought
• Felony murder: Deaths that occur during the commission of certain felonies (arson, burglary, rape, robbery, kidnapping), even if the killing was unintentional
• Killing by poison or lying in wait: These methods imply premeditation by their nature
• Killing a law enforcement officer: Many states elevate this to first-degree regardless of circumstances

Penalties for First-Degree Murder

First-degree murder carries the most severe penalties in the criminal justice system.

Second-Degree Murder

Second-degree murder is an intentional killing that happens without premeditation. The defendant intended to cause serious harm or death but did not plan the killing in advance.

How Second-Degree Differs from First-Degree

The defining distinction is premeditation. First-degree murder involves a deliberate plan to kill. Second-degree murder involves an intentional act that causes death but was not planned beforehand.

Common Scenarios

Second-degree murder charges typically arise in situations like:

• Sudden intentional killing without adequate provocation: A person forms the intent to kill during an argument or confrontation and acts on it immediately, with no plan formed in advance
• Depraved heart murder: Acting with extreme recklessness that shows a disregard for human life, such as firing a gun into a crowd without aiming at anyone specific
• Intent to cause serious harm: Intending to injure someone severely, where the injuries prove fatal

Note what is not on that list. A killing committed in the "heat of passion" after legally adequate provocation is the classic mitigating fact pattern that reduces murder to voluntary manslaughter, not a form of second-degree murder. The provocation has to be severe enough that a reasonable person might lose self-control, and the killing has to follow before a reasonable cooling-off period. Without adequate provocation, a sudden intentional killing stays murder.

Penalties for Second-Degree Murder

Capital punishment is never available for second-degree murder. Sentences vary significantly by state.

Three rows in that table are commonly misread, and each mistake understates how long the sentence can run.

The federal row is the one most often reported wrong. Federal second-degree murder is frequently described as carrying a flat "about 20 years," and that number is not in the statute. 18 U.S.C. 1111(b) provides that "[w]hoever is guilty of murder in the second degree, shall be imprisoned for any term of years or for life." Life is authorized, and there is no statutory presumption of 20 years. The ~20-year figure is an artifact of the federal sentencing guidelines, and even there it is low: USSG 2A1.2 assigns second-degree murder a base offense level of 38, which on the sentencing table produces 324 to 405 months, roughly 27 to 34 years, for a defendant in the lowest criminal history category before any adjustments.

Michigan's statute (MCL 750.317) punishes second-degree murder "by imprisonment in the state prison for life, or any term of years, in the discretion of the court ..." A life sentence is available, but it is not the default. The Michigan Judiciary's criminal benchbook states the penalty plainly as "imprisonment for life or any term of years."

Massachusetts does impose a life sentence for second-degree murder, but parole eligibility is not automatic at 15 years. Under M.G.L. c. 265, s. 2(c), a person convicted of second-degree murder "shall be eligible for parole after the term of years fixed by the court pursuant to section 24 of chapter 279." That statute lets the judge set the minimum anywhere from 15 to 25 years. Fifteen years is the floor, not the expected date.

Third-Degree Murder

Third-degree murder exists in only three states: Florida, Minnesota, and Pennsylvania. Each state defines it differently.

Florida

Under Fla. Stat. 782.04, third-degree murder applies when a person kills someone during the commission of a felony that is not one of the enumerated felonies triggering first-degree felony murder. The statute covers a killing "perpetrated without any design to effect death, by a person engaged in the perpetration of, or in the attempt to perpetrate, any felony" outside that enumerated list. For example, a death that occurs during a drug deal gone wrong could be charged as third-degree murder in Florida.

Florida added a second, separately codified route to the same charge. Under s. 782.04(5)(b), a killing "perpetrated without any design to effect death" that resulted from the unlawful distribution, by a person under 18, of a substance the distributor knew or reasonably should have known contained dangerous fentanyl or fentanyl analogs is also third-degree murder, where the substance is proven to have caused or to have been a substantial factor in producing the user's death. It carries the same grade, a felony of the second degree.

Penalty: Up to 15 years in prison. Classified as a second-degree felony.

Minnesota

Under Minn. Stat. 609.195, third-degree murder covers two situations:

1. Depraved mind murder: Causing death through an act "eminently dangerous to others" with a "depraved mind" but without intent to kill. The Minnesota Supreme Court has clarified that this requires conduct dangerous to people generally, not targeted at a specific individual.
2. Drug distribution deaths: Causing death by selling, giving away, or otherwise distributing a controlled substance (particularly Schedule I and II drugs like fentanyl).

Penalty: Up to 25 years in prison.

The Derek Chauvin case (2021) brought national attention to Minnesota's third-degree murder statute, and it is also the case most often described inaccurately. Chauvin was charged with three counts in the death of George Floyd: second-degree unintentional murder, third-degree murder, and second-degree manslaughter. The jury found him guilty on all three. The district court then convicted and sentenced him on the second-degree unintentional murder count only, imposing 270 months, or 22.5 years. As the Minnesota Court of Appeals explained in affirming that conviction, "although the jury found Chauvin guilty of third-degree murder, the district court did not convict Chauvin of or sentence him for that offense," so the third-degree count was never formally adjudicated and the appellate court declined to review it.

Pennsylvania

Under 18 Pa.C.S. 2502(c), third-degree murder is a catch-all category covering "all other kinds of murder" that do not qualify as first-degree or second-degree. This includes killings committed with legal malice but without the specific intent to kill or the premeditation required for higher degrees. The statute grades it as a felony of the first degree.

Penalty: Up to 40 years in prison.

Pennsylvania is also unique in that felony murder during enumerated felonies is classified as second-degree murder (not first-degree as in most states).

Wisconsin Does Not Have Third-Degree Murder

A common misconception: Wisconsin does not recognize third-degree murder. Wisconsin restructured its homicide code into categories of first-degree intentional homicide, first-degree reckless homicide, second-degree intentional homicide, and second-degree reckless homicide.

The Felony Murder Rule

The felony murder rule holds a person responsible for any death that occurs during the commission of certain dangerous felonies, even if the death was accidental or unintentional.

How It Works

If a person commits (or attempts) an enumerated felony and someone dies as a result, the person can be charged with murder. The prosecution does not need to prove intent to kill. The most commonly enumerated felonies are arson, burglary, kidnapping, rape, and robbery.

Example: If two people rob a convenience store and a bystander has a fatal heart attack during the robbery, both robbers can be charged with felony murder, even though neither intended to cause anyone's death. (Composite scenario for illustration; not a real case.)

Classification by State

Most states classify felony murder as first-degree murder. Notable exceptions:

• Pennsylvania classifies felony murder as second-degree murder
• Florida classifies some felony murders as third-degree (non-enumerated felonies)

States That Have Limited or Abolished Felony Murder

Reform is far narrower than it is often described. According to The Sentencing Project's report Felony Murder: An On-Ramp for Extreme Sentencing, updated in July 2026, felony murder laws remain in force in 48 states, the District of Columbia, and the federal system.

• Hawaii and Kentucky are the only two states with no felony murder doctrine at all
• Michigan and Massachusetts no longer let malice be presumed from the underlying felony. Their high courts require prosecutors to prove malice independently, which removes the traditional constructive-malice form of the rule without ending murder liability for every death during a felony
• Arkansas, California, Connecticut, Delaware, Maine, New Jersey, New York, North Dakota, Oregon, and Washington have narrowed felony murder liability for accomplices who were not the killer

That last group is often summarized as limiting liability "to the actual killer." The summary is too clean, and two states show why the statutory detail matters:

• California: Penal Code 189(e) reaches past the actual killer. A participant is also liable if they aided or abetted the killing with intent to kill, or if they were "a major participant in the underlying felony and acted with reckless indifference to human life."
• New York: Under Penal Law 125.25(3), the protection for a non-killing accomplice is an affirmative defense the defendant has to prove, not a bar on the charge. The defendant must establish all four conditions: that they did not commit or aid the homicidal act, were not armed with a deadly weapon, had no reasonable ground to believe another participant was armed, and had no reasonable ground to believe another participant intended conduct likely to cause death or serious physical injury.

Watch out: Ohio is sometimes listed among the states that abolished felony murder. It is not one of them. Ohio Rev. Code 2903.02(B) makes it murder to cause a death "as a proximate result of the offender's committing or attempting to commit an offense of violence that is a felony of the first or second degree," with no requirement that the defendant intended to kill.

California's 2018 felony murder reform (SB 1437) had resulted in 1,172 people being resentenced as of December 2024, and 78% of them have since been released from prison, according to the California Policy Lab. Read the follow-up numbers carefully, because they are frequently quoted wrong. The resentenced group was convicted of a new offense at a rate of 3% within one year of release, 7% within two years, and 10% within three, compared with 21%, 33%, and 42% for California prison releases generally. Most of those new convictions were misdemeanors. The often-cited 2% figure is narrower than it sounds: it is the share convicted of a new serious or violent felony within three years, five people in total. The report also cautions that full three-year outcomes can be observed for only about a quarter of the people released so far, so the rates may rise as the rest become measurable.

Because these rules change by legislative session and by court decision, confirm the current standard in the specific state before relying on any of it.

Murder vs. Manslaughter

The key difference between murder and manslaughter is malice aforethought. Murder requires malice. Manslaughter does not.

Voluntary manslaughter involves an intentional killing committed in the "heat of passion" after legally adequate provocation. The provocation must be severe enough that a reasonable person might lose self-control.

Involuntary manslaughter involves an unintentional killing caused by criminal negligence or reckless conduct. Examples include a fatal DUI crash or death caused by reckless handling of a firearm.

States Without the Degree System

Not all states use the first/second/third-degree framework.

Texas uses "capital murder" (for specific aggravating circumstances like killing a police officer or multiple victims) and "murder" (all other intentional killings). Texas does not use numbered degrees.

Wisconsin uses categories: first-degree intentional homicide, first-degree reckless homicide, second-degree intentional homicide, and second-degree reckless homicide.

South Carolina has a unitary murder statute without degree classifications.

How Prosecutors Decide Which Degree to Charge

Prosecutors evaluate several factors when deciding which degree of murder to charge:

• Evidence of planning: Did the defendant acquire a weapon beforehand? Did they make statements about wanting to kill the victim? Did they take steps to avoid detection?
• Relationship and motive: Was there a documented history of conflict? Did the defendant have a financial or personal motive?
• Circumstances of the killing: Was the act impulsive or calculated? Was the defendant provoked?
• Witness and forensic evidence: What does the physical evidence show about the sequence of events?

Prosecutors sometimes charge the highest degree they believe the evidence supports and allow the jury to consider lesser included offenses. A jury considering first-degree murder may convict on second-degree or manslaughter if they find insufficient evidence of premeditation.