A family annihilator always kills his children, and often (but not always) his partner; if. The term was coined in the 1980s by a forensic psychiatrist as a substitute for the more placid term familicide. It means a parent, almost always a father, who massacres their own immediate family in a short time

Ronald Gene Simmons | Murderpedia, the encyclopedia of murderers

Ronald Gene Simmons Killed 16 People — 14 Of Them Were His Family (allthatsinteresting.com)

History Behind a Murderer | christieleewhite (wordpress.com)

Christopher Foster | Crime + Investigation UK (crimeandinvestigation.co.uk)

Chris Foster, The Millionaire in So Much Debt He Committed Familicide – History and Things

The Nauseating Case of The Foster Family | Medium