A Dallas tire shop manager was shot and killed on Monday by one of his employees, leaving family and longtime friends searching for answers about what led to the sudden burst of workplace violence, police said. 42-year-old Billy “BJ” Brightman, was fatally shot on Monday. The suspect, identified as 21-year-old Marlon Lawrence, was an employee at the store and has been arrested for murder. The motive for the killing is currently unknown, though police say the suspect admitted to the shooting. | F