Police found the gunman dead of an apparent self-inflicted gunshot wound in the store's break room, where the shooting unfolded, officials said.
The gunman didn't have a criminal history, officials said Friday.City officials also said Friday that police conducted a forensic analysis of the gunman's phone and discovered what was labeled a "death note" that included rambling descriptions of perceived grievances with his co-workers."I don't think he had many people to fall back on in his personal life," said Nathan Sinclair, who worked at the Walmart for nearly a year before leaving earlier this month.During chats among co-workers, "We would be like 'work is consuming my life.' And (the gunman) would be like, 'Yeah, I don't have a social life anyway,'" Sinclair recalled Thursday.The gunman could be "grumpy" but could also be "placid," she said.