Or is there some other explanation?

We will never know. The perpetrator is dead. The authorities will tell us whatever suits the purposes of authority.

We could say that the police have brought this on themselves by their undisciplined and violent behavior toward the public. On the other hand, we can hold the police chiefs, the police unions, the mayors and city councils, the governors, prosecutors, and the Justice (sic) Department responsible for failure to hold accountable those cops who murder and commit gratuitous violence against the public.

When police execute someone, the excuse is always something like this: "He reached under his shirt to his waistband. I thought he had a gun. I didn't want to leave my children fatherless and my wife a widow." The murdered victim's wife and children, if any, are of no consequence.

Conservatives, especially those taught to be fearful of crime, have scant objection to police murders. Their view is always: "The police wouldn't have shot him without cause." The same bias in favor of the police is why conservative jurors always convict.