Alfred Mitchell Junior, 28, was killed in the August 2017 shooting at 37th and Michigan on the city's South Side.
At least six other people were shot while standing on the sidewalk just after 10:30 p.m. when a group of males walked up and fired shots from the corner of the block, police said.
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Antonio Dickerson was arrested Tuesday at his home in Alsip, Chicago police said.
Investigators have not revealed a motive for that shooting.
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