"FBI authorities probably knew that it would take a doozy of a crime for a woman to break the Ten Most Wanted list’s gender barrier, and Ruth Eisemann-Schier was certainly involved in a horrific one. In 1968 Eisemann-Schier and her lover, Gary Steven Krist, kidnapped construction heiress and Emory University student Barbara Jane Mackle. The pair demanded a $500,000 ransom from Mackle’s father.Any kidnapping is horrible enough, but Eisemann-Schier and Krist escalated the horror by burying Mackle alive in a ventilated box in the Georgia woods so she wouldn’t be found until the ransom was paid. When the pair finally received their money, Krist called the FBI with directions to where Mackle was hidden. Amazingly, Mackle was alive and in relatively good health despite spending over 80 hours underground.Police quickly caught up with Krist, but Eisemann-Schier proved to be more elusive. On December 28, 1968 Eisemann-Schier became the first woman ever to appear on the Ten Most Wanted list, and authorities nabbed her just 79 days later. She spent four years in prison before being deported to her native Honduras."
This and seven more hair-raising stories on Mental Floss' Bad Girls Club: Women of the FBI’s Ten Most Wanted List.