Joe Martinez
Joe Martinez was a Mexican bullfighter by trade, according to a Bureau of Prisons memorial article. He was held at USP Leavenworth, a federal prison, and died there on November 29, 1922, of injuries from a confrontation with officers. The memorial states that on November 14, 1922, officers in the cell house and powerhouse area shot him and fractured his skull. The article, published by the Bureau of Prisons in 2015, centers on the death of Captain Leonard and gives this account of Martinez's actions.
Cause of death, as reported: Killed by staff. The Bureau of Prisons memorial says officers shot Martinez and fractured his skull during an incident in the cell house, and that he died of his injuries on November 29, 1922.
Reported by: Bureau of Prisons memorial article (the agency that held him). The only account of how this person died comes from the agency that held him.