My role was vampire hunter that died Night 1.
The retributionist revived me for Day 2. All vampires died at the same night and the amnesiac chose to become me (VH) as well.
The known bug supposedly was that the amnesiac remain as a vampire hunter even with the absence of vampires.
exerpt from wiki: "(Known bug). If you choose to become a Vampire Hunter the same night the last Vampire is killed, you will not turn into a Vigilante, but rather remain a Vampire Hunter for the rest of the game."
However, the amnesiac turned into a Godfather instead.