Its an almost perfect mystery case, with a great catchy name: the lead masks case. Two TV repairmen are obsessed about making contact with extraterrestrials, attempting wild and dangerous experiments. But it seems they went too far: on August 20, 1966, their bodies were found atop Morro do Vintém, Rio de Janeiro, Brazil, in bizarre and unexplained circumstances.

On August 20, 1966 two TV repairmen are obsessed about making contact with extraterrestrials, attempting wild and dangerous experiments, their bodies were found atop Morro do Vintém, Rio de Janeiro, Brazil, in bizarre and unexplained circumstances. A boy named Jorge da Costa Alves (who was 18 at that time) was flying a kite at the Morro do Vintém (Vintém Hill), in Niterói, Rio de Janeiro, Brazil when he found two dead men. Immediately, he made his way back home and called the police. Soon the spot was full of police officers, firefighters and journalists. Manoel Pereira da Cruz and Miguel José Vianas bodies were neatly strewn next to each other, without any sign of violence. They were wearing nice suits and impermeable coats. However, what really caught peoples attention were the lead masks worn by them.

A notebook keeping diagrams and partially coded notes along with a strange letter was found with the bodies. They also had a handwritten note:

"16:30 estar no local determinado. 18:30 ingerir cápsulas, após efeito proteger metais aguardar sinal máscara" (16:30 be at the agreed place. 18:30 swallow capsules, after effect protect metals wait for the mask sign). After an investigation, the detectives reconstructed a plausible narrative of the last days of both men.

Unsolved Mysteries of Lead Masks Case