The teen is charged with first-degree murder and attempted robbery. The suspect, whose name was not immediately released, also faces three additional charges related to a stolen vehicle, criminal damage to government property and a replica firearm.
Police have said the killing of Michael Sullivan, 53, may have been a botched robbery.
Sullivan was just a few blocks from the Green Line Pulaski stop when he was shot in the head. Officers found him lying on the sidewalk in the 4200 block of West Lake Street shortly after 11 a.m. Tuesday.
Sullivan, a father of two daughters and grandfather of two boys, worked the overnight shift at a UPS facility on the Near West Side,