At the time Roberta made the statement, "Dad got heated. He's very selfish, very conditional. The day before he went missing in the afternoon, he was going to provide us copies of the will, and we went over to get the copies. He didn't have them."
Adding "in the afternoon" in the middle of that sentence is so out of place, it's like a flashing red flag. If you look at the confirmed facts in the timeline, "in the afternoon" speaks loudly that Roberta already knew no one spoke to her dad after 10:00 am and her BIL could not account for his time between the last confirmed phone call and the time the housekeeper arrived. Otherwise there was no reason to add 'in the afternoon' in the middle of that sentence.
I agree Paula sounds genuine in her concern over Bob's grief over losing his first wife. I don't recall Paula ever directly confirming she believe Bob had suffered from dementia. I think she carefully chose her words to not contradict Julie's statement regarding the dementia.
As for Jeff's comment that Bob might have left because he became ill. I think there is a whole lot of partial truth to that and Jeff knows exactly what caused Bob to become ill and what condition Bob was in when he left the house. My first theory is Jeff accidently killed Bob in the upstairs bathroom. Became scared knowing how an accident would appear following the heated family meeting and hid the body. Likely with the help of his son. Since the housekeeper confirmed Bob told her Jeff was coming, I believe there were plans to get some things done around the house. I think a confrontation occurred between Bob and Jeff which led to whatever accident occurred.
My second theory is Jeff arrived at Bob's house shortly after that 10:00 am phone call and walked in on, or shortly after, a confrontation between Bob and his grandson and both Andrew and Jeff cleaned up and accident and hid Bob's body.
