I don't know. He's not dirty or anything. I'd just expect that a young man like that would have better places to be besides the library, all day, every day.
Earlier, when I closed for lunch, he had gone to the restroom and was spotted by one of the teachers in that area. Of course, wearing his black duster and his shaved head and all, he was looking every inch the Trenchcoat Mafia type, so he alerted the Resource Officer, who came down, tazer drawn, and asked the guy what he was doing wandering the school. He wasn't wandering. I knew where he was, but she was just doing her job and she did it fast, too. I talked to her and she said that she'd checked him out and that he didn't have any warrants or anything. We both agreed that he seemed a little slow, for lack of a better word. And he wasn't mad at the RO or anything. He was quite agreeable to what she had to say.
He's back in here now. At least he knows that we have a fast response to potential threats to safety.