I've wondered if TM suspected something (regarding VB) but was reluctant to accuse him. His (TM's) little sister and girlfriend were gone, and VB was his friend. The way others have described it, there may've even been a little "hero worship" there. VB allegedly tried to persuade TM to lie for him about that day.Its funny but something I read on TM's fb post stuck with me ( its still there on a public post). Someone asked him if he knew RW had gone inside to make a phonecall after JM was allowed to go shopping with them, and his answer ( to paraphrase) was that 'he didn't know what happened after he thought the girls left'
It could have just been odd wording but it made me wonder if the timeline was slightly different than we have always been told in regards to how long they were at Gordon and how quickly they left after JM called her mum for permission. It also made me wonder if the girls originally pulled away but stopped further down the block for some reason. Maybe to visit another house, or speak to someone, or offer someone else a lift. Maybe CJG was further down the block and they stopped to pick him up.
I maybe overthinking it but I can't shake the feeling that more happened than is being told by those there, and I do have a big question mark regarding TM and VB/CJG.