A murder–suicide, also called a homicide-suicide, is an act where an individual intentionally kills one or more people before killing themselves.
The combination of murder and suicide can take various forms:
Suicide after or during murder inflicted on others
Suicide after murder to escape criminal punishment(s)
Suicide after murder as a form of self-punishment due to guilt
Murder that entails suicide, such as suicide bombing
Suicide by pilot, 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 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