We still don't know if the boy who was killed was guilty or not, and the same goes for the suspect still alive. Resisting arrest if not evidence of guilt. It is only evidence of fear of the authority figures.
I don't know why the father would think this was an inside job. I don't know everything that the Russian mainstream media tells its citizens about America (I'm sure it's very unflattering).
I do not blame the police if they are in a "shoot first, ask later" mode. I do not blame the suspects, if they are innocent, for being too scared to trust the police. I do not blame the father. It's just very, very all the way around.
"Moderation in temper is always a virtue; but moderation in principle is always a vice." -- Thomas Paine