Kidnapped without a trace, Gerard butler

He can't help it, he thrives on it, he believes it makes him who he is, and wants nothing in the world to change this.
Eric,a 30 year old crazed high school teacher has a tendency to crush on younger woman in his classes, he kidnaps them, rapes them, tortures them, and murders them. He thinks that he loves every single one of them and believe that the women he kidnaps are meant to stay with him forever, until they try to escape from his home, the one thing that is separating them from humanity.
What will he do when the women try to escape from him? He makes their bodies untraceable for anyone to find, after he is finished with the bodies, he moves to a different city, changes his name and appearance, and starts over with a different teenage girl.

Have been doing this so many times before in his life, Eric has never been caught and never plans on being caught any time soon.