Here in the U.S. you have to have a special costly stamp to use a silencer.
In Europe they usually hunt using one, saves getting others worried or something.
As for people that abuse animals, it is a very good indicator that they may abuse people in their future.
You can’t purchase a silencer without a stamp? This is a family of hunters, they may have had one for a long time. This isn’t exactly a law abiding family! lol