Video: 'ABC Eyewitness News, NY (Aug 20, 1986) - Edmond, OK post office shooting'

(Wednesday, August 20, 1986, c. 7:00–7:15 a.m. CDT) — Mail carrier Patrick Sherrill, 44, opened fire in a crowded post office in Edmond, Oklahoma, this morning, killing 14 workers and injuring six others before killing himself with a bullet in the head.

Video: 'From the KOCO 5 Archives: Edmond post office massacre on Aug. 20, 1986'

Sherrill’s attack inspired the American phrase “going postal.”

It is currently the deadliest workplace shooting in U.S. history, as well as the deadliest shooting by a lone gunman in the state of Oklahoma.

Video: 'The Edmond Post Office Shooting - Detroit 2 News 1986'