[Merlin]

I would suppose if you had information that can track where your friend's mom is, you can get the cops involved. Just keep the harassing messages as proof, and I think your friend should stand his ground and tell his mother off. He doesn't owe her a damn thing and I'd say if she ever wants to see her baby boy ever again when he leaves, that she straighten her ass up, but I wouldn't say that until he's ready to leave at any time. She might wander into his room with a steak knife if said now.