Involuntary manslaughter is a criminal offense defined as the unintentional killing (homicide) of another person as a result of criminal negligence, recklessness, or during the commission of a misdemeanor (driving while intoxicated), infraction (speeding), or a felony crime that was not inherently dangerous. Involuntary manslaughter is usually a felony offense and often includes significant jail or prison time as potential punishment.

Involuntary manslaughter laws vary from state to state and are generally located in a state’s statutes—often in the penal or criminal code.

In Wisconsin, involuntary manslaughter is not specifically defined as a separate offense in the state statutes. Instead, Wisconsin law addresses the unintentional killing of another person through various degrees of homicide by negligent handling of a dangerous weapon, explosives, or fire; homicide by intoxicated use of a vehicle or firearm; and second-degree reckless homicide. These offenses are covered under Chapter 940 of the Wisconsin Statutes, which deals with crimes against life. Second-degree reckless homicide, which is the closest equivalent to involuntary manslaughter, occurs when a person recklessly causes the death of another human being under circumstances that show utter disregard for human life. This is a Class D felony, which can result in a fine of up to $100,000 and/or imprisonment of up to 25 years. The specific charges and penalties can vary based on the circumstances of the case and the defendant's criminal history.