The disappearance of 8-year-old Georgia Weckler, who was last seen after being dropped off at her home by a neighbor on May 1, 1947

21-year-old Kelsie Schelling was killed by her boyfriend, Donthe Lucas, in 2013. Her remains have never been found.

The case of the Klein brothers, who were last seen at a park in Minneapolis in 1951

Solved with no body: The case of Logan Tucker

Tara Grinstead was last seen in her hometown of Oscilla, Georgia in 2005

The case of Scott and Amy Fandel, a brother and sister who were last seen at their Alaska home in 1978.

The case of Mary Agnes Moroney, who disappeared in 1939 at the age of two.

The disappearance of Acacia Bishop, who was kidnapped by her grandmother in 2003

The case of Kurt Newton, who disappeared on a family camping trip in 1975

Three sisters and a toddler vanished after a house fire in 1977. Only one of them has been found.

The disappearance of Marvin Clark, who hasn't been seen or heard from in almost a century

The disappearance of writer Ambrose Bierce, whose last known location was Chihuahua, Mexico in 1913.

The disappearance of 2-year-old Steven Damman, who was last seen outside a grocery store in 1955

The 'Princes in the Tower' disappeared over 500 years ago. Their disappearance is surrounded by Game of Thrones-esque political drama.

The disappearance of two-day-old Tegan Lane. Her mother, Keli Lane, was charged with her murder in 2010...but what happened to baby Tegan?

The strange disappearance of 8-year-old Joana Cipriano, which may be connected to another, more high profile case

The strange disappearance of Martha Jean Lambert, who vanished in 1985 at the age of 12.

5 people missing in New England