New developments related to Erik and Lyle Menendez's murder conviction have put their chances at freedom closer, and widespread backlash about the case has prompted prosecutor Pamela Bozanich to arm herself.
Friends say Karen Swift wasn't having a good time at a country club Halloween party in Dyersburg, Tennessee. The next morning, she went missing from her home.
Friends Carol Marlin and Margaret (Maggie) Ginn were found dead after meeting for dinner in Marietta, Georgia. But it would take the murder of Kasi Peek, years later, for the crimes to be solved.
Boston police officer John O'Keefe was found dead lying in the snow after a night of heavy drinking. His girlfriend at the time is accused of murder and reversing her car into him.
Keri Murphy, 16, called police to report a break-in at her family's Humble, Texas, home. Her mom Mary Ann Murphy was found murdered, leading to stunning revelations.
After a young father was murdered and a woman was stabbed to death in broad daylight, law enforcement had to determine whether the two crimes could be connected.