Linda Bowdre, 39, vanished from Springfield Township, Ohio, on Valentine’s Day 1988 after being seen that morning having breakfast with her husband, Larry Bowdre. She failed to report to work the next day—unusual for the AT&T executive—and her supervisor reported her missing. A search of the area around the home turned up no sign of her.

Investigators say she left behind her car, clothing and antique jewelry, which suggested she did not leave voluntarily. Her purse was the only item recovered later; it was found about a week after she disappeared in a Cincinnati post office mailbox with credit cards and other personal items still inside. Police learned the marriage was strained: Linda reportedly planned to see a divorce attorney the day after she was last seen and had been involved in an affair with a coworker.

Authorities have classified the case as a homicide, but no body or concrete evidence has been found. A civil suit filed by Linda’s mother in 1989 sought emotional distress damages and the return of antique furniture. Searches based on tips, including one in 2002 from an anonymous caller, have not produced a breakthrough. Does anyone who lived in the area in 1988 or who knew Linda have information that could help explain what happened that Valentine’s Day?