text:  In his high school yearbook, Crooks appears as a smiling teenager. One former classmate is baffled about what switched to 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.