Can't recall what they called it, there was a slang phrase, but at one time some police officers carried a cheap pistol to place next to the body of someone they shot who turned out to be unarmed. Not at all advocating that behavior but it was known to happen. In this case who's to say the deceased did not dump his gun or knife under a bush when he heard sirens?
PS: Running from cops as one reaches toward one's belt is as much an act of suicide as jumping off a tall building.
"Drop Guns" or "throwdowns"