Executed
Slocum
Slocum was executed by electrocution at Sing Sing prison in New York on July 7, 1891, while in the custody of the state. He was the first of three men put to death there that day. According to the Arizona Weekly Citizen, he walked calmly from his cell and sat in the chair, and witnesses reported no tremor. He was pronounced dead after the current was turned off.
Cause of death, as reported: Executed by the state
Reported by: New York State prison officials at Sing Sing (the agency that held him); witnesses to the execution.