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 Missouri, involuntary manslaughter is addressed under Missouri Revised Statutes Section 565.024. It is defined as the act of causing the death of another person through criminal negligence or during the commission of an unlawful act that is not a felony. In Missouri, there are two degrees of involuntary manslaughter. First-degree involuntary manslaughter, which is a Class C felony, occurs when a person acts with criminal negligence to cause death, or during the commission of a misdemeanor or infraction that results in death. Second-degree involuntary manslaughter, a Class E felony, involves acting with criminal negligence but without the element of the commission of another crime. Penalties for involuntary manslaughter in Missouri can include imprisonment, with the length of the sentence varying based on the degree of the offense and other factors. It is important for individuals facing such charges to consult with an attorney to understand the specific implications of the law and the potential defenses that may be available to them.