CHICAGO (AP) — It was February, the middle of lunch hour on a busy South Side street. The gunman approached his victim in a White Castle parking lot, shot him in the head, then fled down an alley.

The next month, one block away, also on West 79th Street: Two men in hooded sweatshirts opened fire at the Bishop Golden convenience store. They killed one young man and wounded five others, including a nephew of basketball superstar Dwyane Wade. The shooters got away in a silver SUV.