Who Is Charles DiLaurentis on Pretty Little Liars?

Pretty Little Liars is over until January, and while season six has been dubbed "the Summer of answers," we still have plenty of questions. After years of theorizing and wondering who "A" is, we finally got an answer: "A" is Charles DiLaurentis, and Charles DiLaurentis is CeCe Drake. Before the big reveal, though, all we could do was try to piece together the evidence. Keep reading for every piece of information we gathered before the finale.