VANISHED ON HALLOWEEN NIGHT: Pierre Mercon (Season 3 Ep. 46)

On October 31, 1996, Pierre Mercon was dropped off at a bar to celebrate Halloween and recently completing a course.  His mother agreed that she would meet him later to pick him up and bring him home.  At around 2am, Pierre called his mother, telling her he was ready to be picked up.  When his mother arrived, Pierre was no where to be found.  Despite nearly thirty years having gone by, there are no answers as to what happened to Pierre.