Maybe; in the end every cop has to protect his weapon (with whatever force is necessary).
“Alexander said the man ran at the officer, who backed up and ordered the person to stop before shooting him twice. Police did not find a weapon at the scene”...
Mike Brown didn’t have a weapon either but his ass is dead for attacking a police officer. There is more to the story than is being told.
So let's make that a reason to be used...then when they no-knock your house at 3 am and you don't realize its the police...they can kill you because they were protecting their weapons.