Year Veteran: Jimmy Lam

year veteran: The person was not authorized to discuss the case publicly and spoke on the condition of anonymity, according to Toronto Star. The violence ended when the 38-year-old Lam turned the gun on himself and took his own life as workers ran from the packing facility and police closed in. Jimmy Lam, an 18-year veteran of UPS, appeared to single out the three slain drivers but investigators have yet to determine what set him off on Wednesday, an official in the San Francisco Police Department said. Friends and colleagues recounted several personal and professional troubles that Lam had been experiencing. But none of the men who were shot were managers, Cilia noted, adding that he knew of no disputes between Lam and the victims. Article Continued Below Read more Shooting at UPS centre in San Francisco leaves 4 dead, including gunman officials react-text 151 Three UPS employees were shot and killed on Wednesday at a San Francisco warehouse and customer service facility before the gunman shot himself, authorities and the company said. /react-text JOSH EDELSON / AFP/GETTY IMAGES Most recently, he was upset with UPS managers and had filed a grievance in March claiming he was working excessive overtime, said Joseph Cilia, Lam's friend and an official with the union that represents UPS drivers. (www.immigrantscanada.com). As reported in the news.