“We’ve never seen anything like it, at all,” said Max Kapustin, the senior research director at the University of Chicago Crime Lab. A hardworking father killed just before 1 a.m. A West Side high school student murdered two hours later. A man killed amid South Side looting at a cellphone store at 12:30 p.m. A college freshman who hoped to become a correctional officer, gunned down at 4:25 p.m. after getting into an argument in Englewood. While Chicago was roiled by another day of protests and looting in the wake of George Floyd’s murder, 18 people were killed Sunday, May...