So, by your logic, if someone is unarmed and running at someone to attack them, but the person being attacked has a gun, that person should allow the attacker to attack them before acting? Also, You have got to be kidding me with your last sentence. Police Officers are trained to diffuse situations, They don't just go out looking for fights. But as they are humans as you and I are, they are not infallible and sometimes make mistakes. Please, educate yourself before parroting propaganda against Police Officers.