There’s the Harvard coffee guy (see below), and there’s the Johns Hopkins spy guy. The guy who boasted to the undercover FBI agent who caught him that he had “lots of medals” from Cuba. That’s because he’d been spying for them for thirty years.
One of his students reminisces about My Professor, the Spy. A writer for Politico wonders why, given the broad hints the spy dropped over the years, it took so long to catch him.