<human>: I purchased a device that allowed me to connect the hard drive to my computer. I was able to access the files on the "broken" hard drive, which contained references to him. I went into his room and saw my hard drive sitting on his desk (with his name written on it). My files were still on it (including pictures of me).

I go to a school where, if I turned him in, he could quite possibly be kicked out. I don't want to be responsible for that, but at the same time, this is somebody that I trusted, but that has now intentionally stolen from me and attempted to deceive me. 

My question is: Should I (1) Turn him in immediately, without confronting him; (2) Confront him one-on-one and give him a chance to admit it, and not tell on him; or (3) Send an email to all of my classmates in this dorm (about 40), say that I know one of you stole it, and give it back by tonight or I will turn you in?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: classmate stole my HDD, left his broken one behind so I'd think it was mine. Should I confront him or turn him in?