A murder–suicide is an act where an individual intentionally kills one or more people before or while killing themselves. The combination of murder and suicide can take various forms:Suicide after or during murder inflicted on others Murder that entails suicide, such as suicide bombing or the deliberate crash of a vehicle carrying the perpetrator and others Murder of an officer or bystander during the act of suicide by cop Suicide after murder to escape criminal punishment(s) Suicide after murder as a form of self-punishment due to guilt Suicide before or after murder by proxy Murder linked with a person with suicidal ideation Joint suicide in the form of killing the other with consent, and then killing oneself Suicide by pilot

Mass murder is the violent crime of killing a number of people, typically simultaneously or over a relatively short period of time and in proximity. A mass murder typically occurs in a single location where one or more persons kill several others.