Quin E. O'Brien End of Watch: June 22, 1978 Age: 50 Rank: Sergeant Agency: Waukesha County Sheriff's Office Years of Service: 24 County: Waukesha Location on Memorial: V Incident Surrounding Death Sgt. O'Brien was in the courthouse when he heard gunshots fired in a courtroom. He responded to assist and was shot by a prisoner that had just overpowered and shot Deputy Geszvain. Geszvain died from his wounds on June 21 and Sgt. O'Brien died the following day. See Geszvain. The incident that caused Sergeant O'Brien's death occured on 6/21/1978. Back