That is simply not true. That is how the death squads in Brazil operate.
Otherwise the police could arrest someone who they say could have had a gun er maybe possibly because he looked the type, the guy starts struggling, so pin him down and shoot him twice in the head.
It's never been like that. That is exactly how death squads operate in Brazil. That's the whole point, the whole problem ..
If they pin him down there's no threat to police or anybody else, hence no need to shoot him, you're a bit thick aren't you.
Put yourself in a place and think for a change, you're an office you are sent off to deal with a suspect that is as reported armed what do you do, wait for him to draw the weapon?