Senicide

English doctor and serial killer (1947-2004)

mass shooting in Texas

American mass murderer (1925–2008)

thumb|upright=1.3|Ubasute no tsuki (The Moon of Ubasute), one of the 100 works in the series One Hundred Aspects of the Moon, by [[Tsukioka Yoshitoshi]]

American serial killer (1932-1984)

Senicide, also known as geronticide or gerontocide, is the practice of killing the elderly. This killing of the elderly can be characterized by both active and passive methods as senio-euthanasia or altruistic self-sacrifice. The aim of active senio-euthanasia is to relieve the clan, family, or society from the burden of an old person. But an old person might kill themself (autothanasia) altruistically. In case of the altruistic self-sacrifice, the aim is to fulfill an old tradition or to stop being a burden to the clan. Both are understood as a sacrificial death.

American real-estate heir and convicted murderer (1943–2022)

thumb|Ättestupa in Västergötland as depicted by [[Willem Swidde in Erik Dahlbergh, Suecia antiqua et hodierna (1705)]]

American serial killer (1952–2017)

Russian serial killer

American serial killer (1929-2011)

Thalaikoothal (, ) is the traditional practice of senicide (killing of the elderly) or involuntary euthanasia, by their own family members, observed in some parts of southern districts of Tamil Nadu state of India.

Russian serial killer

British serial killer

English-born Australian serial killer (1932-2005)

Nazi war crime committed in Greece

nazi killing of Greek civilians

American serial killer

Scottish serial killer

Canadian serial killer and former registered nurse