Pretty Little Liars: If Dr. Elliott Rollins Isn't Who He Says He Is . . . Then Who Is He?

This one seems like a no-brainer, but bear with me. We know Elliott is friendly with Mary Drake, but what if it goes deeper than that? What if Elliott's family has close personal ties with the DiLaurentis family? Is it possible he's known Charlotte and Alison since they were young? Is it possible he's known Jessica DiLaurentis and Mary Drake his whole life? If his involvement in this whole thing goes back farther, he could play a much bigger part than we know.