Molly's faces being shut down due to public walkway violations.

Season 4 Episode 4 "Big Friends, Big Enemies"
The Intelligence unit investigates a drive-by shooting, which kills a local rap star. Voight initially suspects a terrorist group may be involved, but, after a second shooting in gang territory, the unit considers the possibility that both crimes are part of a gang war. Meanwhile, Burgess spots Atwater's younger brother while out visiting potential shooters and targets.

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