|Name:||O'Brien, Patrick M.|
|District / Unit:||Twelfth Street Station|
|End of Watch:||03-Aug-1881|
|Incident Details:||Police Officer Patrick O’Brien, 32, was a 10-year veteran of the Chicago Police Department, assigned to the Twelfth Street Station.
On August 3, 1881, Officer O’Brien along with Officer Ray entered the home of Thomas Cahill at 50 Rebecca Street. Officer Ray believed that Cahill had discharged a weapon and attempted to interview him when Cahill barricaded himself in a room inside of his home. As the officers tried to get Cahill to exit, he fired a fatal shot Officer O’Brien through a crack in the door. Officer O’Brien was fatally shot in the chest.
Thomas Cahill was found guilty and sentenced to life in prison. In 1883, the Supreme Court upheld the lower court's decision.
Officer O’Brien was laid to rest in Calvary Cemetery. He was survived by his wife, five children, and mother.