The bloodiest incident in Alcatraz's history pitted a detachment of combat savvy Marines and the Bureau of Prisons against three men armed with seventy-two rounds of ammunition and two guns. Two guards were killed, one (R.J. Miller) when Cretzer attempted to slay several captives and another (Harold Stites) when he stepped into the crossfire. The lives of D-Block inmates were jeopardized by intensive shelling. Coy, Hubbard, and Cretzer were finally cornered in a utility passage and either slain or driven to suicide. Writing on the wall of the cell where captured guards were kept pointed the finger at the men named here. Carnes alone was spared both informal and formal execution.