On the evening of April 13, 1993, 22-year-old mother of four Shawn Marie Williams left her Catoosa, Oklahoma, home for a short trip to a nearby convenience store and never returned. Her pickup was found abandoned and out of gas that night on U.S. Route 412, less than a mile from her house, but there was no trace of Shawn until an aerial search three days later located her body in a marshy area known as Rocky Point.

The scene showed signs of a violent struggle: wounds on her knees, lacerations on the back of her head, and her shorts pulled on backward. An autopsy found Shawn had been sexually assaulted and died from a gunshot wound to the chest that ruptured her aorta. Investigators preserved DNA evidence from the scene.

A break in the investigation came in 1996 when police linked that DNA to Karl Myers, who had a long history of violent and sexual offenses. He was tried for Shawn’s murder in January 2000, convicted by a jury on February 14, 2000, and sentenced to death. Myers later died of natural causes while on death row on December 28, 2012.

Did anyone who knew Shawn or lived near Rocky Point in April 1993 notice anything unusual that night?