By Sonali Kohli and Iris Lee Los Angeles Times Jaleyah Collier had just said goodbye to Kevin Cleveland outside a doughnut shop a few blocks from Hawkins High School on a spring afternoon in 2017. Get home safe, she told him before walking way. Minutes later someone drove into an alley nearby, got out of the car and asked Kevin, 17, and two others about their gang affiliation. The gunman then sprayed