First of all I want you to know that I'm really sorry for you and I hope you get to heal.

From what I'm getting he's some sort of pro-ish photograph. You might be able to give him a public review on google or on his pro facebook page with an alt account if he has any of those.

If you're ready for drama and he isn't pro, you may also be able to post on a local facebook group for photography or something similar, and tell people to be weary of him.

If you aren't ready yet for public drama, you can also contact other models (or ex-models, one by one, once again via his facebook or instagram friend list and post history) in order to see if they're also victims.