The gunman who massacred six people inside the store where he worked had a manifesto on his phone - where he revealed he was upset about a change in his employment status.Police revealed that gunman Andre Bing's deadly manifesto, which has not yet been made public, contained claims that his co-workers were harassing him.A neighbor of Bing has described the moment the gunman left for his rampage in silence - with victims' friends revealing to DailyMail.com that he would regularly have arguments over ‘working weekends’ with his killer.
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