The suspect is wanted for a shooting in the 400-block of North Laramie Avenue at about 10 p.m. on January 10.
Police said he followed the victim before he started shooting.
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The suspect is described by police as 30-40 years old and was wearing a dark-colored jacket, green pants and brown boots.
Anyone with information is asked to contact Detective Martorano at 312-746-8252. Anonymous tips can be sent to www.cpdtip.com.