The shooting occurred last Friday at about 8 p.m. in the Woodlawn neighborhood.
The video shows three men who opened fire near a park where kids were playing.
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In the minute long surveillance clip you see three men walking around in the 6300-block of South Ellis Avenue. Moments later a man labeled "suspect one" by police opens fire.
Two other men follow, with the group pointing their weapons toward a basketball court and park full of kids who were out playing.
The surveillance does not show an up-close shot of their faces but they hope someone recognizes the group.
A 12-year-old boy who was at the park was shot in the right leg. He is the son of a Chicago firefighter.
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The family and police are asking for help in identifying the suspects.