Vehicular manslaughter is a criminal offense defined as the unintentional killing (homicide) of another person as a result of criminal negligence or recklessness while operating a motor vehicle—often while the operator is intoxicated by alcohol or drugs, engaged in a high risk activity such as street racing, or committing a misdemeanor or infraction offense (speeding) with ordinary negligence.

Vehicular manslaughter is usually a felony offense and often includes significant jail or prison time as potential punishment. Vehicular manslaughter laws vary from state to state and are generally located in a state’s statutes—often in the penal or criminal code.

In Washington State, vehicular manslaughter, also known as vehicular homicide, is addressed under RCW 46.61.520. It is defined as causing the death of another person while operating a motor vehicle in a reckless manner, with disregard for the safety of others, or while under the influence of intoxicating liquor or any drug. Vehicular homicide is a Class A felony in Washington, which is the most serious type of felony and can result in significant penalties, including imprisonment. The law stipulates that if the driver was under the influence of alcohol or drugs, there is a mandatory minimum sentence of 78 to 102 months in prison, depending on prior offenses. If the death resulted from reckless driving or disregard for the safety of others, the sentencing may vary, but still carries severe consequences. The specific circumstances of the incident, such as involvement in street racing or committing a misdemeanor, can influence the severity of the charges and the penalties imposed.