In 2006 journalist Alexander Litvenenko was murdered by poison, perpetrator unknown. His death was one of several mysterious killings--which appear to have been connected by one thing.
The Tecaxic-Calixtlahuaca Head is a terracotta head which was likely part of a larger statue, discovered in 1933 near Mexico City. What makes this discovery so strange is that it was found with Pre-Colombian artifacts, but seems to be of Roman origin. Did the Romans have Pre-Columbian contact with America? Or is there a different explanation to be had?
On October 19th 1986 Mozambican president Samora Machel and his staff were flying to the capital city when their plane changed course and subsequently crashed in South Africa. The crash killed Machel and 33 others who were on-board. Was it an accident or was it an amazingly executed assassination plot straight out of a Die Hard movie?
On the night of October 30, 1975, 15-year-old Martha Moxley was brutally bludgeoned to death in her yard in Greenwich, Connecticut. Despite years of police investigations, and one actual conviction, the identity of Martha's killer is still up for grabs in the minds of many people.