The cold-blooded Roanoke killer kept getting fired, kept threatening co-workers, and kept claiming he was the real victim. Vester Lee Flanagan claimed in a suicide note Wednesday that June’s massacre of black parishioners at a South Carolina church was “the tipping point” that sent him on the path to murdering two journalists on live television Wednesday. But in court papers and interviews with The Daily Beast, former colleagues describe Flanagan as a problematic employee, who was repeatedly reprimanded for his harsh treatment of coworkers, and complained racism was behind harsh evaluations of his work. “He just had a history of...