I had a student teacher for my speech/english class in 10th grade who acted buddy-buddy with some students, even as far as talking to them on msn messenger in class while they were at home skipping. It seemed harmless at first, just a friendly dude who was easy to get along with. Hoo boy were we wrong. I didn't learn until next year that over the summer he had been paying kids to do "stuff" with them. He wasn't necessarily soliciting them in the expected sense, but did things like buy a kid a phone and put them on his plan if they let him tickle them for a couple minutes. I guess this went on for a little while, but it ended when he asked a couple kids to get another kid, Dustin (the first kid who he started talking to online and whatnot) drunk and tied to a chair for him. He offered them some absurd amount of money, like over $1000 to do this. At that point, some of the kids went to the cops, but they couldn't prosecute him for the fact that he didn't actually do anything sexual with the kids, just weird rubbing and tickling and stuff. I guess the chief of police, who had a kid in my class, approached him and told him that he'd better stop or he would probably get the shit kicked out of him by a mob of pissed off parents.
I heard rumors of him trying to kill himself or something afterwards, I'm not really sure, I only heard about this after the fact. However, the really troubling part is that I went to a school play that my cousin was in a couple hours away and saw the guy during the intermission. I passed by him talking to somebody and overheard him say "Actually, I'm vice principal here now."