He may have been spiraling out of control, but I don't believe he was psychotic when he planned and carried out his crimes. He went to great lengths to plan and cover up the murder. He lied to detectives because he knew what he did was wrong and shameful. There is no indication that he was seeing or hearing things that weren't there. He invented the story about being threatened by sex traffickers, maybe based on his own experiences with sex workers. He probably had a whole library full of




.
He may have a personality disorder or depression, but I think his actions show he was of sound mind when he carried out the murder. Maybe he had a breakdown and could no longer get gratification from flashing, or whatever he usually did for satisfaction. He may have fantasized for a long time before actually carrying out the crime. It was sexually motivated, and he did it because he wanted to. That's the part he doesn't want to admit. The only thing wrong with his thinking was that it was twisted and evil.
IMO