The Unsolved Mystery of the Lead Masks Case

Summary: On a humid August evening in 1966, two Brazilian technicians set out on a secretive trip that ended with their lifeless bodies on Vintém Hill—dressed in suits, wearing homemade lead eye masks, and carrying a cryptic note that spoke of “swallowing capsules” and “awaiting a signal.” Nearly six decades later, the Lead Masks Case remains one of the most chilling and confounding unsolved…