Nancy Leichner, 21, vanished from Alexander Springs Recreation Area in the Ocala National Forest, Altoona, Florida, on October 2, 1966. She and friend Pamela Nater were part of a picnic with a local skin-diving club and had attended with their boyfriends. The two women walked into the woods along a nature trail and left purses, clothing and Leichner’s prescription glasses on the picnic table.

An extensive search across a 15-square-mile area turned up no trace of either woman. Investigators later focused on Gerard John Schaefer, a former deputy convicted of two murders in the 1970s and suspected in many others; by 2007 authorities said they believed Schaefer was responsible based on witness statements and jailhouse confessions, but he was never formally charged in this case. Schaefer was murdered in prison in 1995; the disappearances remain officially unresolved and crucial details are still unknown.