Linda Sue Endorf was 31 when she vanished from Tukwila, Washington, in the winter of 1976. On December 8 she was at Seattle-Tacoma International Airport working as a ticket agent for Western Airlines. Accounts differ about her last movements: some say her husband James dropped her off for her shift and she never reported to work; others say she finished a shift at 10:30 p.m. and was heading home. After that day she was never seen or heard from again.

Linda was the mother of a 13-year-old daughter and had brown hair, brown eyes, and a burn scar on her right shoulder. Her husband did not report her missing until December 17, 1976. He filed for divorce two months later; the divorce was finalized in 1978 with him awarded custody of their daughter and most of the couple’s property. No records show Linda using her Social Security number or contacting government agencies after December 1976.

The case was reopened after James’s second wife, Debra Ann Endorf, was found murdered in January 1993 and James later died by suicide; his death did not include a confession about Linda. Linda’s disappearance remains unsolved and is considered suspicious. Did anyone in Tukwila or at Sea–Tac in December 1976 see or remember Linda Endorf?