Carl Alfred Eder, 33, was reported missing from Napa County, California, after last being seen on January 1, 1976. His case stands out because of a long criminal history: at 16 he was taken in by Thomas Pendergast, then killed Pendergast’s wife and their four children. Eder was convicted, given a life sentence, and later escaped from a minimum-security facility in 1974.

Despite nationwide searches and reported possible sightings into the 1980s, Eder remained at large and his whereabouts have been unknown since 1976. The case is still open and authorities continue to seek information, although no substantial leads have been reported in recent years.

If anyone has verifiable information about Eder’s movements or whereabouts around the time he disappeared or afterward, please come forward.