He's seventeen. That's the age of legal consent for sexual conduct in most states, which means that someone of consenting age could be charged with statutory rape for even making threats or implications of a sexual nature against someone younger than consenting age. There are other offenses to consider, some of which could have federal status due to the interstate nature of the communications.

Dayv, I wouldn't wish what your family has been put through on anyone. Someone very close to me was in a similar terrible situation once and, well, I'll leave that at that. I truly hope this is the end of the situation, but if not please know that I'm in your corner if the time should come for a Cleansing of the Wicked.