This is exactly what people should do. The police won’t help so just kick them out and make them try to sue you instead.
In fact, this guy was nice. I would have put their stuff on the curb (kept anything I liked) and then if they break in possibly shoot them in self defense (depending on the state call the police...but I’d have to question my life choices on why I’m in such a state to begin with).
Really — this guy was too nice giving them a chance to reclaim their stuff. Move it all to the curb. Give them 24 hours to get rid of it or it’s going to the dump.