Robert Raymond Cook, Canadian murderer (b. 1937)
Robert Raymond Cook (July 15, 1937 - November 14, 1960) was a Canadian mass murderer, convicted for the killing of his father Raymond Cook in Stettler, Alberta, in 25 June 1959. Cook murdered his family, including his father, stepmother, and five half-siblings at their home in Stettler, but was only charged for his father's murder, for which he was convicted and sentenced to death.
Cook was executed in 1960, the last man to be executed by the province of Alberta.