Cindy Elias (6 of Diamonds, Minnesota)

The last time anyone saw Cindy Elias alive was in 1977 when she was enjoying a night out with friends in the small mining town of Virginia, Minnesota. After she was unable to find a ride home, she decided to hitchhike. Her body was found hours later, discarded in a logging field. For 45 years, investigators in northern Minnesota have been trying to solve her murder.