"I don't have anyone to look for," Ed says, and this time it really is casual. "I don't have any family or friends. And I'm trained as a forensic scientist, solving crimes. I'm very good at it. Crimes are just puzzles and I'm exceptional at those."

If there's a lot of crime, there's a good chance there's people solving it. And without his Arkham record and the tiny complications of those murders he did, he can go back to working in forensics.

"Oh. Um... thank you, I'd appreciate it." He opens the door and holds it, because that's just common manners.