Some thoughts I have and it is all speculation, too. With AW's correction of April 12th as a drop off date, I wonder why HR would hand over SW to JW several days before she gave birth? Would she be so generous and trusting as to allow JW to have all this extra time with SW when HR and her family knew he could not be trusted - he was trying to get custody of SW. With AW's correction, it appears to me that SW would have never been returned to her mother. I don't know the details of the agreement they had, but it seems like this would have been a long time to let go of a child when you cannot trust the father. In addition, there were other family members of HR's who could have cared for SW when she was having the baby. HR had her mother, her dad, her brothers and she had HG, and IIRC, HG was a stay-at-home mom.
We do know that DR received a phone call and was upset when she left work the night of the murders. Did HR call her mother at work with upsetting news that JW showed up and just took SW a day early?
Maybe JW told the truth in the interview, but was not forthcoming about what really happened? He was like golly gee shucks, I reckon we just missed it by hours. And his mother probably slapped him upside the head and had to correct what he said because his statement put him at one of the murder scenes that night. Again, way too many details to keep everything straight and someone screwed up.
I know this has been discussed previously on this forum, but I've not followed everything, so I apologize in advance if this is redundant.