Absolutely
I was in Italy during the Aldo Moro killing by the Red Brigades.
I too had the Carabinieri draw down on me. When a bunch of guys with machine guns and automatic pistols surround you, you put your hands in the air and lay face down on the floor. I had a machine gun at the back of my head for what seemed like hours when it was probably no more than a minute. All the while I was saying “Americano, Americano”. I have no doubt that if I had run they would have killed me.
You do not mess with police in a foreign country, especially during periods of terrorist or rebel activity.
I feel very sorry for this Brazilian guy but given the circumstances the police did what they had to do.
And good police training means they didn't shoot an unarmed man when they had overwhelming force and had you surrounded. There are enough of them to just sit on you.