This is interesting developement.
I am inclined to believe Pingpongsam in his claim.
What we do not know is whether 'the Doctor' is refering to EFHW or Sudgy.
If 'the doctor' is Sudgy, this claim pretty much much confirmes that sudgy died of targeting scum, not of a NK.
Archetype was a bus driver, and since two scum bus drivers is unlikely, we can be almost certain that Sudgy did in fact target Walrus.
This makes it very probable that Walrus is scum.
If 'The Doctor' is EFHW. There is less evidence against Walrus as he could have been nightkilled. We got one more possible explanation of a eventual missing kill, so Walrus is a little worse off, but not by much.
I also think it is cery curious that Jotheonah claimed to have targeted Sudgy as soon as he thought someone might have watched him. It is obviously true that he targeted Sudgy, but if he did with a NK, or with the role he claimed is not so obvious.
I think the best we can do about Jotheonah is to leave him alive, and have him confirm his role N2.
Have him targeting me (or any other person, EFHW can deciede). If he guesses my modifier correctly, he probably speaks true. If not he is a liar.