Come on, we know that disfellowshipping is not a permanent thing or a life ban... ever.
We have no details of the re-in statement but after 13 years , if he pleaded repentance, they would let him back. Even a prison term is not for life.
I am certainly not defending their action but I understand it . The bad thing is that he should have been reported to the police at the time, if they were honourable and had any thoughts for the outside community.