Tamir Rice:
According to the release, federal prosecutors with both the Civil Rights Division and the US Attorney's Office for the Northern District of Ohio concluded that they could not prove that Rice's constitutional rights were violated or the officers obstructed justice.
"In order to establish a federal civil rights violation, the government would have to prove that Officer Loehmann's actions were unreasonable under the circumstances, and that his actions were willful," federal attorneys said. " ... an officer is permitted to use deadly force where he reasonably believes that the suspect posed an imminent threat of serious physical harm, either to the officer or to others. "
Prosecutors said that because the officers' stated that Loehmann thought Rice was going for a gun, the Justice Department would have to prove that "1) Tamir was not reaching for his gun; and 2) that Officer Loehmann did not perceive that Tamir was reaching for his gun, despite his consistent statements to the contrary."
You are correct - I have never made a motion like going for my weapon. He did and that is why the officer was not charged legally nor civilly. your point fails
As for
Philandra Castile, after reviewing the dashcam video and other evidence, the officer was acquitted of all charges and never sued civilly. So my response is the same as above.
Personal Example: When I pulled my weapon on the rapist and held him, police came and I immediately holstered my weapon and put my hands up. They knocked me on the ground and sat un me, hand cuffing me after taking my side arm. That is what they are trained to do - no harm, no foul. When all the yelling and screaming stopped, we talked. Guess what?! Three out of the four officers where white. (Gasp!). Other than muddy clothes I suffered no physical injury and the officers actually thanked me. And I am not white! Go figure.