Michael and Mary Short were found shot to death in their Henry County home. The couple's 9-year-old daughter, Jennifer, was found six weeks later in a North Carolina creek.
Law enforcement agencies around the country have increasingly begun to print and distribute decks of playing cards with information about various cold cases to incarcerated people.
Tanna Togstad and Timothy Mumbrue - along with Togstad's pet dog - were found stabbed to death more than 30 years ago. Tony Haase claimed to have been drunk on the night of the murder and "was afraid he was involved" after seeing the news on TV.
Police say they used DNA to identify the man who killed Asenath Dukat, an 8-year-old who disappeared in 1980 during her one-mile walk home from school. Her body was found in a ditch three hours later.
Rumors swirled early in the investigation that Shanan Lynn Read was killed after using drugs in a Seattle apartment with a group of men. Although her death was initially investigated as a drug overdose, now officials say she was beaten to death.
Using DNA from a blood trail left by the killer at the scene, investigators say that Nancy Bennallack was likely murdered by her neighbor, Richard John Davis, more than 50 years ago.
JonBenet Ramsey, who was found dead in the basement of her family's Boulder, Colorado home on Dec. 26, 1996, would have turned 32 years old on Saturday.
Authorities believe Richard Pierce, 86, had several motives to get rid of his wife, Carol Jean, nearly half a century ago — including money and their bad relationship. Carol Jean's body was never found, but police believe Pierce buried her on his property before ultimately moving her remains.