DefCon, the annual hacker conference, has a strict policy concerning journalists: filming attendees without their permission is off limits.

Dateline NBC’s Michelle Madigan registered for the conference as a programmer, not a journalist, and was said to be lurking around with a hidden pinhole camera allegedly trying to catch a federal agent on camera.

Madigan was in attendance at what she thought was a “Spot the Fed” contest when DefCon founder Jeff Moss announced that the game was changing to “Spot the Undercover Reporter” and that the reporter was present in the room. The above video tells the rest of the story.

Mole Caught on Tape [Wired] via Gizmodo