I trust Mr. Carny's truth because of the rewrite ability on one of the characters and also because OMGSECRETTIMES BUUUUTT he could have taken a truth and changed the wording slightly to make it more believable. Like maybe one person can screw with the narrative but he wrote 3, because 3 does seem like a lot. So I'm not certain but I'm not immediately suspicious of his claim.

I'm also less inclined to believe TSoL's truth because of the one witch thing in his statement and how it seems to contradict with other information.

With that said, I'm also not for killing a potentially innocent and possibly helpful person without being more certain, personally