re: Where Is This Mysterious Alton Sterling Tape Showing A Gun to his Head Before the Incident

You're wrong, and you are either intentionally perpetuating a lie or unintentionally doing it by buying into someone - who may or may not have a financial incentive to do so - who is mischaracterizing what the Acting U.S. Attorney said.

What he said - word for word - is in the last post on page 1, but I'll put it here for ease of reference:

"The videos show the officers as they arrived on scene and engaged with Sterling. The videos show that the officers directed Sterling to put his hands on the hood of a car. When Sterling did not comply, the officers placed their hands on Sterling, and he struggled with the officers. Officer Salamoni then pulled out his gun and pointed it at Sterling’s head, at which point Sterling placed his hands on the hood."

Not once did the Acting U.S. Attorney say a "the office put a gun to his head" much less "prior to the tazing / struggling / shooting." To the contrary, he said the officer pointed a gun at his head after struggling with Sterling, who was refusing to comply.

I'm sure you can understand the difference between "pointing a gun" at someone's head and "putting it to his head." The latter evokes an almost execution-like event (or at least a precursor to such) while the former connotes some distance between the gun and the person-at-whom-it's-pointed's head. For example, one can point a gun at someone's head from 5 ft., 10 ft., 100 ft., etc.