I don't know but he should be in a psychiatric hospital. If I were on the jury
He didn't get "more and more dark." He got darker and darker. He also wanted better usage of punctuation and capitalization. These factors led him to commit murder.
He *became* more and more dark. You just don't have what it takes to be a proper grammar Nazi.
Baby steps, my dear. Baby steps. You can't crush their spirits in just one blow - you have to milk it for a period of time. And by the way, I think I make an excellent Nazi. Uh, wait....