Jevir Gray, a 34-year-old driver with UPS, wears a "RIP Mike" patch for fellow driver Mike Lefiti, outside the UPS facility in San Francisco, Calif., Friday, June 16, 2017. Jimmy Lam had his troubles: a drunk driving conviction, a grievance against his company, a struggle with personal issues and depression a few years ago. But colleagues and investigators say none of it helps explain why the UPS driver showed up at his San Francisco workplace and gunned down three colleagues, wounding two others. (AP Photo/Janie Har)
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