The real cause of an ex-pro football player becoming homicidal is that our sports teams, all the way down to high school, prize aggression over fairness and morality and self-control. High school athletes abuse other students and are forgiven. College athletes abuse women and are forgiven. Pro athletes amplify their egotism with their huge salaries and are forgiven. The worst of them are time.bombs who can't control their aggression. And TV broadcasts fund this system. Costas was scapegoating guns, when COSTAS and the TV sports establishment are a major cause of out of control athletes.