in several of these situations you may become a suspect by talking to the police. Plenty of instances of people being killed or injured by the police also begin with them calling the police for help.
That doesn't mean never call/talk to the police. That is a crazy viewpoint driven by hyper focus on risk mitigation.
It is like refusing to leave your burning house because you might be hit my lightning.
The boy was for one, unarmed and they decide to start shooting (eleven times!!) at him? I cannot imagine what those people were thinking.