About 12 years ago here in NH had similar incident with a guy named Dragua [spl?] small town, was watched very closely and still ended up killing multiple LEs and several town officials.
From personal experience, in my town we had a guy who announced many times he would have no problem killing cops.Do you think we did not watch him?
Now Phil I bet if some guy told you he had no problem killing you, you would demand the cops protect you, or would you kill him first?