 In his high school yearbook, Crooks appears as a smiling teenager. One former classmate is baffled about what switched for this once diligent student. He was always getting good grades on tests, everything like that. He was very passionate about history, but it was nothing out of the ordinary. He was a nice kid and I had never had an experience with him where I was like, he, you know, isn't nice. He was always nice and I was always friendly to him.