Trayvon Martin was stalked and killed because a white man was scared? In what universe? Trayvon Martin was beating a mans head on concrete when he was killed in self defense. Tragic yes and a scared Hispanic man, yes. Scared he was going to have his skull crushed and killed by a healthy 18 year old kid.

Tamir Rice was shot because instead of doing what the officers ordered him to do several times, he reached for what appeared to be a gun in his waistband. It was a toy with the yellow tip removed. The yellow tip was on it to identify it as a toy and not a real weapon. A tragedy but one completely preventable if the boy had just put his hands up like he was told. That officer will be paying the rest of his life.

The cases of Mr. Coleman and Mr. Jones are the only two you cite that seem to apply. Both cases indicate scared white men. However, you infer that there are only white officers who are scared? They are far from the only officers on the street that are scared these days.