the second intern (spoilers, speculation) Wild guess at the future...

New intern is fantastic with computers, movie-style software rock star.  Can process large data sets he's not necessarily supposed to have access to and turn up needles in haystacks when needed (narrowing the list of Geller students, hacking into online sites to modify data). Also, he's developing a simulation of the police department.

What happens when he dumps the department's entire case file history, lab reports, databases, etc into his magical simulation game to make it "real" and his algorithms turn up some correlations between certain notable missing people and Dexter's case history and online activity? His computations see what others can't, the Dexter character isn't acting right. Who does he tell?