I saw interview where the PI specifically said that Daniel was worried about Stern.
He does mention Stern but he also says that he was concerned about other people in her life too. He probably wasn't happy about all of the crap that was going on.
I have a theory about the Thompsons/Shelly.
I think there has been a DNA test already done on Dannielynn and it shows that G. Ben is not the dad. I think even though he had a vasectomy he still realized he could be the dad and that's why he bent over backwards to get that house and work out that mortgage agreement. I think after Dannielynn was born and he saw it wasn't his that's when things began to escalate and he demanded Anna to follow thru with the agreement but Anna's sense of entitlement and HKS bad advise led them to not make arrangements to pay the mortgage.
Just my theory.
I saw that, too. The first time he narrowed it down to Stern, he couldn't remember Howard's name. The next interview he was much more specific and after that, he became even more specific. He may have been nervous, he may have forgotten a few things and then remembered them later, he may have embellished, he may have been 100% truthful. We do not know. These are some of the reasons I take my more neutral position and why inquests and grand juries and police investigations are done and I'll wait for those results, if any are to be made public.