Only two countries in the world have police who don't carry guns in regular service. Those are UK and NZ. In all other developed countries, the police may carry a gun, but there is a thorough investigation if it is ever fired.
and china. police in china generally is not armed. (china may or may not be considered a developed country, but i think that distinction is irrelevant. i am pretty sure there are more than three countries in the word where police is not armed, or where armed police is a distinct unit used only for specific tasks where arms are needed). but that wasn't the point i was making, rather, in most countries police simply does not get violent, nor do they have to fear being shot at, because of gun controls.