I mean, whoever it is has already been pretty sure it was him, but stayed anonymous to avoid the media circus, thinking, "What difference would it make to anyone at this point." Or perhaps he has other reasons for staying silent, like being married or in a relationship. But perhaps now that he sees the outcome of the case he is disgusted, and wants to do something. Or maybe he wants to make money off the deal. Couldn't he be tested to confirm his paternity and then sue Casey for wrongful death?