The newly released files detail the FBI's investigation into one of the many suspects they spoke to, Raymond Sidney Russell.

Some mysteries fade with time. Others linger for decades, haunting the people who remember them. So, we asked members of the BuzzFeed Community to share the unsolved cases they can’t stop thinking ...

We all love a good unsolved mystery, and we feel a sense of satisfaction if we can put the clues together and reach a theory that makes sense. However, some cases are so cold that it's hard to find ...

KING 5's Greg Copeland is still digging into Unsolved Northwest's latest mystery involving a sailboat that went missing in 1971.

REDDING, Calif. - David Phillip Askew has been missing for nine years, last seen on February 3, 2017, on Market Street in Redding. Askew, who also went by the names David Asken or Dave Dawood and was ...

A family's search for answers continues as Tommy Simpkins was found dead near Levi's Stadium. If you have any information, please reach out to the authorities.