Go take a look at it and find out for yourself. If you see a transfer case and axles up front then it is AWD - simple as the question your asking.
Previous owner could have done an unknown amount of modifications to it.
Apparently there needs to be an IQ test requirement before anyone purchases a TBSS these days. I could train a piss-ant to check for a transfer case. I group these people in with the crowd of degenerates that steal TBSS's for a LS2 with 100k miles on it.