A few months ago my friend was added by this girl on snapchat. Hes 18 and shes 17. She called late at night and from one turn she made it sexual and he sort of went along with it. She said she wanted to show something and she sent pics, he said damn nice or something but felt uncomfortable. She asked to see his dick but he refused and said that its a secret or something. He only talked to her for a few days but she didnt even know his last name, number, no mutual friends, etc... he has severe paranoia and depression. He said it wouldnt workout the next day and blocked her from all communication, never saved anything, and cut her off. He has factory reset his phone twice and deleted social media since he feels like cops are looking for him since she was a year younger than him at 17, this girl literally is going to college in a few months. All he does is think about this as his ocd and paranoia causes him to hyper fixate on things, also since the law could consider this predatory when hes just gotten out of high school it isnt comporable to a 30 year old. He talks about suicide a lot as well. What can i do for him?