Although I'm not exactly complaining, I find this curious.
In other cases, police officers have been known to jump fences and sneak through back yard which searching for some burglar that someone spotted. When such police encounter a family pet, they seem to often just gun the dog down.
Here we have a dog attack two people -- one an infant -- and the police wrestle with the dog, one cop being injured by falling during that struggle and the dog being successfully subdued and put into confinement.
Such relative gentleness seems surprising. But the world is upside down.
Not a cop, a passer by.
I think it was the citizen bystander who was injured when he fell.