Dirty cops. A bogus eyewitness. Years in violent prisons. And a liberal politician whose star keeps rising. Jamal Trulove almost saw it coming. He figured he might be arrested, or at least spend some quality time with police, after his friend Seu Kuka was shot and killed one warm night in July 2007. "When somebody dies in the hood, everybody feels like they’re involved," he explained recently, during a sit-down with VICE at the clubhouse of United Playaz, a violence-prevention nonprofit based in his hometown of San Francisco. "When someone gets killed, you can plan on getting jacked up by...