I remember when Bob first went missing and its been so very long. i never believed the SIL; I think that it's very likely after such a heated "get together" the night before that his one daughter had her husband return and possibly kill bob that day. Yes, cleaning up a murder, can call for "home repairs" and trips to Home Depot that's a fact. I've never believed his claim and most likely the last person to see him is responsible for his demise. I don't believe the family wanted his new wife to have a dime; they were tired of waiting for him to die, so one or all hatched this scheme to make sure this new wife never received a dime. It sounds to me like his children cared only about one thing: His bank account balance. This is motive in this crime; finding his body will be tough, but I'm hopeful that the case truly is being worked on and I just wish that TES could come and scan the remote areas that the SIL, Daughters, or Bob himself were known to go; I mean out in the desert. I remember the SIL's excuses that he went for a hike that day. I've not forgotten about that at ALL. I don't get to post much here but I saw Bobs thread and had to post. I think there will be arrests at some point for his murder. It's clear that Bob has not attempted to make contact or touch his money in any way, I doubt he ran off at his age. I think that "they" (his children) killed him. IMO; there is much motive in thi case. 15K was nothing to these "adult children" they wanted the kit and kaboodle, and were most likely enraged to find that he had remarried and would be changing his will.
All of that, happening in the days leading up to his murder. I do think he was murdered and I do think it was familial, I doubt his new wife (who by law is entitled to his estate) had anything to do with this. It's the SIL's presence in and out of his home that day that really always stood out to me as suspect. so tracing him; and everything about him is so important in this case.