CHICAGO (CBS) — New video released on Tuesday shows an off-duty Chicago police sergeant shooting from his personal vehicle at an unarmed teenager in front of a Morgan Park home last year.

hayes riccardo New Video Shows Off Duty Chicago Police Sergeant Shooting Teenager Ricardo Hayes

Sgt. Khalil Muhammad was off-duty when he shot Ricardo Hayes, then 18, in the arm and chest on the 11100 block of South Hermosa Avenue. Hayes, who is  developmentally disabled, had a history of sneaking out of his home, according to a detailed account of the incident published by The Intercept.  

The Civilian Office Of Police Accountability (COPA) made the video public. Hayes has filed a lawsuit against the city and Muhammad.

In the surveillance video from the front porch of a residence, Hayes is seen running to the left of the screen. He stops as a vehicle pulls up, and shots ring out moments later.

cops video New Video Shows Off Duty Chicago Police Sergeant Shooting Teenager Ricardo Hayes

At the time of the shooting, Chicago Police Supt. Eddie Johnson said the officer first spotted the man “acting suspiciously” in the 10000 block of South Wood. When the officer began to question the man, the man became elusive.

Johnson acknowledged he did not have all the information, and he simply told reporters the incident “escalated in some way,” prompting the officer to shoot the man. “We still have many unanswered questions,” Johnson said.

According to the Intercept, Muhammad spotted Hayes and began chasing him. Hayes became frightened and continued to run away. Hayes eventually stopped and Muhammad shot him while sitting inside his pickup truck.