On March 18, 1990, two policemen demanded to be buzzed in by the guard at the Isabella Stewart Gardner Museum in Boston. At least, they looked like policemen. Once inside the building, the men ordered the guard to step away from the emergency buzzer.
They handcuffed him and another guard and tied them up in the basement. For the next 81 minutes, the thieves raided the museum's treasure-filled galleries. Then they loaded up a vehicle waiting outside and disappeared.