It is always possible that a prosecutor might be game for a trial without a body but I don't think that will be the case at all. Pennsylvania, and the Pennsylvania State Police in particular, are quite content to wait decades before finally going after someone. Right now, as I see it, there are two possibilities. One possibility is that cadaver dogs hit on either the home or a vehicle and LE is trying to determine if there is a co-conspirator. The other is that there was no hit by cadaver dogs in the home or the vehicles and there is certainly a co-conspirator. As it is, even if Anna is found it is quite likely that how she was killed (I do believe she is dead) will not be able to be determined. What is important about this case is that the victim and the people around her are educated and are not a collection of half-wits. That said, I believe only one of the people involved was smart enough to keep a "get out of life without parole" card as an insurance policy. As for the other person, I believe she, since I believe there is a woman involved, is completely screwed.