I also do not see the constant desire to question murderers. I guess I do not see anything to be gained.Dead. They don't need to question him.
Did he believe the Democrat propaganda? Or was he simply mentally disturbed? Or was he trying to make a name for himself? Was he bullied in high school? What was his sexual orientation?
I can't see how an answer would matter.
Bystanders alerted the police, the officer investigated, the shooter shot and was killed in return.
Any more "news" isn't news at all. Just go forward and correct any found deficiencies.