That must be pretty rare. But it is probably very rare when a cop’s own child kills one of his own. Imagine the pain that Chief Brown was going through at the time and probably still has to this day, to think that his own son did this. If you are still this emotional about it, imagine Chief David Brown’s level of emotion. I admire his strength at this terrible time. And I pray for Dallas and for law enforcement everywhere.
The dead cop was from a suburban department.
As far as mentally ill - well, loading up on PCP will make folks act crazy.