Same letters, different emails, same scam, different photos.

Thier contact was made thru Facebook at Zoosk.

I´ve suspected from the start and i´ve colected a lot of photos from either "girls". It is the same guy who makes them. I send you 3 photos of each. They just asked me the money so that´s when i think it is as clear as can be. They have template letters for each time of the relation but he did the mistake of sending the same letter thru different "girls". I just received the help letter from them, they are very active, and i still haven´t repplied. How should i proceed to get a jail to this guy?