Dateline NBC “She Didn’t Come Home” May 16 2026
Dateline NBC returns with a haunting cold case investigation in “She Didn’t Come Home,” airing Saturday, May 16, 2026, at 9/8c on NBC. Reported by Josh Mankiewicz, the episode examines the 1991 disappearance of Pennsylvania mother Kathy Heckel, a case that remained unsolved for decades before investigators finally secured a murder conviction without ever recovering her body.
Kathy Heckel, a 40-year-old management secretary at International Paper in Lock Haven, Pennsylvania, vanished on July 15, 1991, after leaving work for lunch. Coworkers watched her drive away from the paper mill shortly before noon, and she was never seen again.
Friends and family immediately believed something was wrong. Kathy was known as a devoted mother who would never abandon her children or disappear voluntarily. Her car was later discovered abandoned in a hospital parking lot several days after she vanished, but there were no signs of a struggle and no indication of where she had gone.
Investigators soon focused on Kathy’s coworker, Loyd Groves, a married chemist at the paper mill who had allegedly been involved in an affair with her. According to witnesses, Kathy had recently tried to end the relationship, but Groves refused to let go. Friends later told investigators that Kathy had become fearful of him and believed he was stalking her.
On the morning Kathy disappeared, coworkers reportedly overheard a heated argument between the pair inside the mill. Witnesses later saw Groves and Kathy sitting together inside his van shortly before both vehicles left the property. Groves returned to work hours later acting nervous and unsettled, according to testimony from coworkers.
Police eventually discovered blood inside Groves’ van, and years later advanced DNA testing confirmed the blood belonged to Kathy Heckel. Investigators also uncovered evidence suggesting Groves attempted to create an alibi and feared arrest almost immediately after Kathy vanished.
Despite the lack of a body, prosecutors pursued the case decades later. In 2018, after a lengthy cold case investigation, a Pennsylvania jury convicted Loyd Groves of third-degree murder. He was sentenced to 10 to 20 years in prison while continuing to maintain his innocence.
“She Didn’t Come Home” revisits the mystery surrounding Kathy Heckel’s disappearance, the emotional toll on her family, and the extraordinary effort by investigators to solve a case without physical remains. The Dateline episode is expected to feature details about the affair, the mounting circumstantial evidence, and the decades-long pursuit of justice for a mother whose family never stopped searching for answers.
