Bloody hell, what a lot of nonsense on here.
Firstly, he is not a paedophile. This is not, as suggested earlier, because he didn’t have sex with her. This is because paedophiles have a sexual attraction to children-physical children ie prepubescent. At 15, she is not physically a child even though she, is of course, legally one. If a crime was committed then yes, the young man would be added to the sex offenders register. That would still not make him a paedophile.
Secondly, from a moral POV, a lot will depend on whether he backed off from sex talk once he knew she was underage. It would be unusual for a 15yr old to say she’s 17, engage in sexting then be all, ‘surprise, I’m actually 15’. That sounds more like catfishing to me.
Legally, unless he saved any explicit pictures or sent any messages that obviously smack of grooming or sent anything suggesting sex after she admitted she was 15, then the police will not be interested. They may have a word about ensuring he’s sure about who he’s talking to but as there was no physical contact then as long as no saved explicit images or suggestion of grooming then he doesn’t need to worry about being prosecuted. In fact, they may be able to give some sound advice re the other FB pages. I believe there is a way to retrieve your own expired Snapchat messages within a certain time. Hopefully one message will show a backing off once he knows she’s 15.
To the poster earlier talking about hunting him down as you’ve done before-get a grip! This is not a vigilante state. This is an 18yr old (at the time) talking to a 15yr old whom he thought was a 17yr old. Not a man grooming a 13yr old as in the scenario you describe. 🙄
I’m a secondary school teacher and I will say that whilst I fully believe in the importance of the age of consent, in the minds of teenagers, it’s a very remote, arbitrary, unfathomable line that adults have drawn in the sand. There is often very little physical, emotional or psychological difference between 15-17 (in their eyes) (I know op’s son was 18) so they don’t ‘see’ it or heed it anywhere near as often as they should. I’m not condoning that but they just don’t understand or consider there to be any difference. 😬
My advice is to speak to the police and speak to a lawyer. Good luck. Hopefully, lesson learned.