Died in jail or a lockup
O'Brien
O'Brien was held in the Alamosa jail in Alamosa, Colorado, when a mob took them from the jail on December 1, 1887, and lynched them. The Iowa Plain Dealer reported the killing on December 8, 1887. Nothing in the account describes who O'Brien was, and the names of those in the mob are not given.
Cause of death, as reported: Taken from custody and lynched