Should the officer who killed Tamir Rice be charged with murder?

[Green Line]

Of course not. They responded to a call of a person waving around a pistol threatening people. It's not the job of the officers to get all the way on top of the person to inspect if it's a fake or not. If it turns out not to be a fake, they're dead.

[Green Line]

Tamir reached for his waistband, and the officer had been called to the scene because of reports of a threatening person with a pistol.  When someone reaches in their wasteband, it's generally understood that they're going for their weapon. In the split second that can be the difference between life and death, it's not the job of the officer to take any chances.