I deleted the reply you just made as it has some major spoilers. You can send me an email or a DM on Discord if you want to talk about it more. But I want to say that if the stats say that the person is dead, then they are dead. and when that person is dead you get another killer. When that person is alive they will be the killer so you can get different killers depending of your playthrough.
Now if you say that despite that person being dead, they still show up and talk to you at the end then that's a bug.
Let me know. thanks.