In the early morning of January 12, 2005, Officer Scott Armstrong was killed when his patrol car was struck head-on by a vehicle being driven the wrong way on I-370, near I-270. The driver of the wrong way vehicle, who was drunk at the time, was also killed in the incident.

Officer Armstrong was a US Navy veteran and served in the Persian Gulf. Officer Armstrong began his career in law enforcement with Oak Harbor, Washington Police Department where he worked for nearly a year. He returned to St Louis and worked as an officer in Sunset Hills while waiting for a position with Bridgeton PD. He got that job on January 6, 2003 and has served there for 2 years. He was survived by his eight year old son.