Executed
Tom "Black Jack" Ketchum
Tom "Black Jack" Ketchum was hanged in 1901. A historical overview published by the New York Post says the executioners did not account for his weight, and that his head came off when he dropped. The overview describes the hanging as botched.
Cause of death, as reported: Executed by the state
Reported by: historical overview of the hanging (news reports) (reporters).