I'm going to believe Skyfall's claim now that I think about it. unvote I don't think Doc just wouldn't kill someone last night so if I had to guess I would say scum roleblocked him and killed him on the same night because they figured out his role on Night 1.
What I think happened was that he was about to claim BG then realized it might not be a good idea because he didn't know if he would be counter claimed. We also have the added advantage that if we lynch him and he flips scum BG like I think he might then we've caught his target as scum as well.
I didn't take LC's lie detector breadcrumbing seriously. She's breadcrumbed a power role plenty of times in the past just to be killed and have a shit role. VINTAGE MARTYR LC. I don't think she would breadcrumb a power role if she had a power role.