I would say this guy needs some counseling of some kind at the very least. Not sure about recidivism. From personal observation most of the Witnesses involved in this kind of thing seem to be situational rather than serial. This guy just may have a bolt loose rather than being a real predator. Don't know enough about the situation. If he's a predator I'll be happy to throw the switch myself.
I doubt that the distinction of situational or serial was lost on the girl in this case or the other victims in any other case. Just out of curiousity, how many JW molesters have you have the chance to personally observe?