ROANOKE, Va. (AP) — Living alone in a world of perceived slights, Vester Lee Flanagan II festered and fumed. His hair-trigger temper directed at a random collection of people he encountered never seemed to stray into the type of violent behavior that would have put him on the radar of police or mental health professionals. By not crossing that line, he avoided doing anything that would have made it illegal for him to purchase the gun he used to kill two former co-workers on live TV in Virginia. Flanagan, 41, had never been arrested for a felony and had no criminal record.