First-degree murder is premeditated and deliberate, while second-degree murder is intentional but not planned, or shows extreme reckless disregard for life.
First-degree murder
Premeditated and deliberate killing with intent. Also felony murder in many states. Penalty: life in prison or death in some states.
Second-degree murder
An intentional killing that isn’t premeditated, or a killing with extreme indifference to human life. Penalty: often 15 years to life.
Manslaughter
Voluntary (heat of passion) or involuntary (reckless).
Differences by state
Definitions vary, and some states have third-degree murder.
Proof
Prosecutors must prove intent and premeditation for first degree.
Example
Planning a poisoning is first degree. A fatal bar fight fueled by a sudden argument may be second degree.
Advice
Consult an attorney.
First-degree murder in detail
First-degree murder is the most serious homicide charge. It generally requires intent to kill and premeditation, meaning the person thought about the act beforehand, even for a short time, together with deliberation. Many states also include murders committed during certain serious felonies (felony murder), killing by poison, torture or lying in wait, and the murder of police officers, children or witnesses. Penalties are typically life in prison or, in some states, the death penalty.
Second-degree murder in detail
Second-degree murder generally involves an intentional killing without premeditation, or a killing caused by extreme recklessness that shows indifference to human life. For example, an unplanned killing in the heat of a fight, or firing a gun into a moving car. Penalties vary widely, from 10 or 15 years to life.
Manslaughter
Manslaughter has no malice aforethought. Voluntary manslaughter occurs when someone kills in a “heat of passion” after serious provocation. Involuntary manslaughter results from criminal negligence or recklessness, such as a fatal drunk driving crash. Penalties are usually lower, often 2 to 15 years.
Differences by state
Murder laws are state laws, and there are 50 versions. About two-thirds of states have first and second degree classes, some add a third, and others (like Texas, Oregon and Michigan with variations) do not use degrees in the same way. Federal murder (18 U.S.C. 1111) includes first and second degree.
Proof
The prosecution must prove each element beyond a reasonable doubt: the killing, the mental state and the lack of legal justification. Evidence of planning, such as buying a weapon, lying in wait, prior threats or hiding the body, can support premeditation. Defenses include self-defense, insanity, duress and lack of intent.
Example
A man learns of an affair, buys a gun that day, drives to the other man’s home and shoots him: first-degree. Two men start a bar fight and one fatally stabs the other with no earlier plan: likely second-degree or manslaughter.
Advice
Murder charges are extremely serious. Anyone facing one needs an experienced criminal defense lawyer immediately. This is general information and not legal advice, and state laws differ.
Statutory structure and examples
First-degree murder is generally a killing that is willful, deliberate and premeditated, such as planning a poisoning, or a death during a dangerous felony under the felony murder rule. Second-degree murder is an intentional killing without premeditation, or a killing caused by conduct showing extreme indifference to human life. Manslaughter is a lesser charge, often punished with sentences of a few years to 15 years. Under federal law at 18 U.S.C. 1111, first-degree murder carries death or life imprisonment, while second-degree murder is punishable by imprisonment for any term of years or life. Some states, like Pennsylvania, define degrees by the type of intent, and others, like Virginia, have capital murder as a separate category. The prosecution must prove each element beyond a reasonable doubt. This is general information, not legal advice.
Based on data from the Cornell Legal Information Institute and the US Department of Justice
