I'm not saying this guy did this, but from a BP perspective, isn't it possible someone makes a bunch of bets and then realizes a key player is injured or something and tries to take his bets back by saying is system was hacked?
Again, I'm not calling this guy a liar, I'm just saying I don't think it was wrong BP let the plays go. They should, however, keep looking into it and return the money if they find it was hacked.