At a bail hearing Saturday for Ruben Roman, prosecutors shed more light on what happened leading up to the shooting. They say surveillance video shows Roman walking up to a corner and taking a "shooting stance" as a vehicle drove by before he fired seven or eight shots while standing next to Adam.
The relationship between Adam and Roman is unclear at this time.
Police have said its ShotSpotter technology detected eight gunshots and officers were dispatched to the largely Latino neighborhood in the city's West Side around 2:30 a.m. on March 29. When police arrived, Adam and Roman fled, Chicago Police Department Superintendent David Brown said at a news conference last Monday.
One officer tackled and arrested Roman while another chased Adam, who prosecutors say was holding a gun in his right hand when the officer shot him. Officers repeatedly told Adam to put the gun down before he was shot, prosecutors say.
That gun matched cartridge casings found in the area where Roman was firing, prosecutors say.
An officer shot Adam once in the chest during the "armed confrontation" in an alley, police say. Adam died at the scene.