Agent Mysterious (A Criminal Minds Fanfiction)

JJ really likes the new guy, but he's just such a mystery and nobody knows much about him. What will the future bring between JJ and the new agent, Liam Larson? How will Liam grow to care about each member of the team? Will he open up about his past? Rated [R] for sexual content, violence, and everything else that Criminal Minds has. Bit of an AU because JJ is never with Will in this and I make up all the cases and stuff.