Jones was 23 at the time of his escape and was last seen working in the dining facility. Fort Leavenworth spokesman George Marcec said no one recalls anything about the escape because it was so long ago.
Between 1977 and 1998, there were seven escapes involving 11 prisoners at the disciplinary barracks, but all but Jones had been recaptured. The Castle was closed in 2002 and prisoners were moved to a new prison on the base.
It wasn't immediately clear whether Jones would be court-martialed or simply returned to prison to serve out his sentence. He could also face escape charges, Golden said.