On the morning of December 8, 2017, a dispute between two shuttle bus drivers at the former Walter Reed Army Medical Center in Washington, D.C. escalated into a fatal shooting. Brian Andrew Gibson, 45, was shot and killed in the 6900 block of Georgia Avenue NW after an argument with a colleague, 59-year-old Koonce Wright. Both men worked transporting construction workers at the site.

Court documents say Wright alleged the altercation became physical and that Gibson struck him, dislodging some teeth. Wright then retrieved a .38-caliber revolver and shot Gibson as Gibson was moving away; documents say Wright fired again while standing over Gibson. Gibson was found with multiple gunshot wounds and pronounced dead at the scene. Wright was arrested later that day and charged with second-degree murder while armed; some court documents label the homicide domestic in nature. Wright has pleaded self-defense, saying he feared what Gibson might do next, and was ordered held pending a preliminary hearing.