We found Waldo. He was working at his day job when you were trying to find him.
When you get called in to work on the weekend and do the LEAST amount of work.
He works at the last bookstore in his neighborhood and NEVER shuts up about it.
This worked until he forgot to remove that thing and it was stuck in his tire.
Working for airport security is an important job and I'm glad someone as responsible as Harry Potter works there.