Chicago police have released surveillance footage of the gunman investigators believe is responsible for murdering a teenage boy and injuring a man in the Loop last Friday night.
The video clips released early Wednesday show a man wearing a tan jacket over a purple tracksuit or onesie pulling a gun and aiming it toward a crowd of people gathered in the 100 block of South Dearborn Street around 10:37 p.m.
An 18-year-old man was wounded and 14-year-old Armani Floyd was killed…