Pierre Mercon, 21, vanished from Richmond Hill, Ontario, in the early hours of November 1, 1996, after attending a Halloween party at the Original Six Sports Bar on Oxford Street. He had called his mother from a payphone at about 2 a.m. and asked to be picked up at a nearby corner. His mother arrived shortly afterward and found the area deserted; Pierre was gone with no sign of him.

Pierre was wearing an army-style camouflage poncho as part of his costume, army fatigues, brown work boots, a green wool hat, and a long black wig. The poncho was later found rolled up under the table where he had been sitting inside the bar. Reports from people in the area conflicted—some said he took a taxi, others that he walked to a cafe—but no confirmed sightings followed. His family says his bank account went untouched and investigators found no enemies, threats, heavy drug use, or debts; foul play is strongly suspected.

Friends and family searched in the days after his disappearance and have pushed for answers ever since. The initial police contact with the family was delayed, with a detective reportedly not visiting until three days after he was reported missing. Does anyone remember seeing Pierre that night or have information about his movements between the payphone call and when his mother arrived?