A murder–suicide is an act in which an individual kills one or more people before (or while) killing themself. The combination of murder and suicide can take various forms: * Murder linked with suicide of a mentally unstable person with a homicidal ideation * Murder which entails suicide, such as suicide bombing or the deliberate crash of a vehicle carrying the perpetrator and others * Suicide after murder to escape state punishment(s) * Suicide after murder as a form of self-punishment due to guilt * Suicide after (or before) murder by proxy * Suicide after or during murder inflicted by others * Murder to receive a death sentence willfully * Joint suicide in the form of killing the other with consent, and then killing oneself * Murder before suicide with the intent of preventing