The United States used black children as alligator bait, allowed and encouraged dogs to rip humans' flesh from their bones and eat it, until they died, made black mothers nurse their infants so whites could play "Hit the N****r Baby" with baseballs that were aimed either at the head, or stomach so they would vomit. This was before portable cameras, microphones and video recording devices were widely available. I'll posit USA probably did it first.