Is The Narrator: Trustworthy Or Unreliable?

The narrator is not reliable he is just borderline crazy because he sees apparitions. He believes that after hanging the cat it magically appears behind his bedpost. When he said he doesn’t have remorse for his dead wife makes him sound like a psychopath. After finishing hitting the wall he said that he saw something that looks like a demon that proves that his seeing hallucinations. Because the cops did not see anything except the dead body. He isn’t responsible for his actions which doesn’t make him look credible. He is trustworthy because nobody will talk this bad about themselves or about something they did. When he uses demonically to describe his actions it proves that he is saying something that most people will not admit about themselves.