Not to spoil everyone's obvious glee at a "rogue" JW getting caught doing something bad, and speaking purely as the Devil's Advocate, but I highly doubt this assailant is actually a JW. He was much more likely posing as JW to throw his victim off her guard. That said, I'd bet my last nickel that he does have some knowledge of or connection to the JWs, perhaps through family. What complete stranger to the JWs would even think of using that ploy?
Regardless, JW or not, I hope they find this bastard and throw the book at him. Maybe he will learn what being violated feels like when he gets to prison.