Had to add to my case below. Will keep updating as new facts come to light:
1. PT Behaviour on Day 1 and post-lynch:
I noted at outset of Day 2 his behaviour in PT is exactly what I would expect from him as scum (and only Momo's behaviour made me think he was clean).
He was initially not keen to throw suspicion on others in the hood, and just wanted everyone to follow him. He just 'assumed' Momo and I were town, and only suggested Pine was scum when Pine wouldn't toe the line. ABR was non-committal on my Momo scum-read, and didn't engage with it until after the flip. After the flip, he was excited and jubilant, and claimed credit for the lynch.
2. Flavour:
As noted in my setup theory, I think Amanda Young is highly likely in the game, as a survivor. ABR has instead claimed, in the PT, that he is Corbett Denlon - the child of 2 confirmed townies. She was not a prominent feature of the film franchise, so I'm not sure she would be a character in the game, especially given both her parents were. She was also never subject to Jigsaw's traps, so I wouldn't really call her a 'survivor' at all, and she'd be way way down on the list of likely survivor characters compared to Amanda Young. Gut says it MUST be a fakeclaim.
3. PT Behaviour Night 1 onwards:
During Night 1, ABR suddenly became frantically active in the PT, having neglected it for a while before that (me and Pine were both stuck in traps at this point of course). He claimed his role and flavour, and also claimed that Xtoxm was a "mailman" (incidentally, not what he flipped), and then gave the story I repeated yesterday in order to make me suspect Xtoxm, which on reflection may not have been true. He was not keen on my suggestion of lynching those not in a PT, which suggests if ABR flips scum, there is some more credence to it. I made it clear that I didn't trust him (by not reciprocating his claim, or sharing info about what happened to me in my trap), and since then he has become very angry and aggressive in the PT.
4. Momo wagon:
ABR was not at all eager to get on the Momo wagon, despite my endless cajoling, and the fact he was pretty happy wagonning everybody else. When Momo was about to get lynched, he randomly turned attention to ABR and started tunnelling him. He knew he was dead by then, and didn't have a convincing reason, so would have been incentivised to try and buy his buddy some towncred.
5. His approach to the hood:
ABR was very keen to reveal the identities of people in the hood, has put lots of effort into protecting everyone in that hood during the day, and has taken a firm line since Day 1 that 1 scum-flip confirms the others as town. Which is exactly what he would do as scum, knowing that 50% of the hood was scum. ABR-town would maintain a healthy suspicion of me, but instead he has continually behaved as if he knows I'm town.
6. No Traps:
If ABR was town, I think he would have been high on the list for scum to trap. He has claimed that he doesn't have any immunity to this. This is not conclusive, but very suspicious given scum have focussed on other veterans like me and Farside.
7. Roleclaim Slip:
Explicitly claimed there are no VTs in the game, then later claimed VT.
8. Behaviour on Day 3 (so far):
Falsely claiming to have driven wagon on Momo on Day 1 to get town-cred.
Falsely claiming to have disagreed with case on Xtoxm and wanted to stop the lynch (when he explicitly said he agreed with the case, and was part of the lynchwagon).
Gets angry and blames Mod for giving him a bad fakeclaim.
9. Inconsistent with Vecna-VaultDweller claim:
Vecna is claiming he is someone's kid, and has a flavour and role about finding his dad (VaultDweller). ABR is also claiming to be someone's kid, but that kid is just some vanilla who ended up in the survivor PT without being a survivor. Spot the odd one out.
