Lead Masks Case
The 1966 deaths of two Brazilian electronics technicians found dead on a hilltop wearing lead masks, with no apparent cause of death and a cryptic note about extraterrestrial contact.
INVESTIGATION OVERVIEW
The Lead Masks Case (Portuguese: Caso das Máscaras de Chumbo) occurred in August 1966 in Niterói, Brazil. Two electronics technicians, Manoel Pereira da Cruz and Miguel José Viana, were found dead on a hilltop called Morro do Vintém. They were wearing formal suits and lead masks over their eyes. Next to them was a notebook with instructions for using the masks and a note saying '16:30 be at the agreed location, 18:30 swallow the capsule, after the effect wait for the signal.' No cause of death was determined. The lead masks were of a type used in industrial photography to protect from radiation. The case has been linked to UFOs, government experiments, and secret societies.
KEY CLAIMS
The men were attempting to contact extraterrestrials and died in the process
The lead masks were to protect from radiation during a UFO encounter
The men were killed by a secret government experiment
The capsule mentioned in the note was a poison pill
The case involves a cover-up by Brazilian authorities
SUPPORTING EVIDENCE
The men were found in formal attire on a remote hilltop with no signs of struggle
Autopsy could not determine the cause of death
The lead masks were professionally made and of a type used in X-ray photography
The notebook contained instructions and a timeline suggesting a planned event
The men had told friends they were going to meet a UFO
COUNTER ARGUMENTS
The men may have died from exposure, poisoning, or natural causes
The lead masks could have been for a photography experiment, not UFO contact
The 'capsule' could have been medicine, not poison
No evidence of extraterrestrial contact was found at the scene
The case is a mystery of unknown cause of death, not necessarily paranormal
TIMELINE
Men leave home, telling family they will meet a UFO
Bodies discovered on Morro do Vintém
Autopsy inconclusive; case remains open
KEY FIGURES
Manoel Pereira da Cruz
Electronics technician, victim
Miguel José Viana
Electronics technician, victim
ORGANIZATIONS
Brazilian Federal Police
Law Enforcement
SOURCES
RELATED ENTITIES
PEOPLE
Manoel Pereira da Cruz
Miguel José Viana
ORGANIZATIONS
Brazilian Federal Police
EVENTS
Men leave home, telling family they will meet a UFO
1966-08-20
Bodies discovered on Morro do Vintém
1966-08-22
Autopsy inconclusive; case remains open
1966-08