Executed
John Siemson
John Siemson was executed at San Quentin penitentiary, where he was held in state custody. A report in The Plymouth Tribune, published on August 6, 1908, said he was one of two men executed at the prison. His execution was carried out there under the authority of the state.
Cause of death, as reported: Executed by the state
Reported by: newspaper account of the San Quentin execution (reporters).