Clayton John Condos was 20 when he was last seen on Monday, March 20, 2006, in the area of Brentwood Mall in northwest Calgary, Alberta. He vanished without contact after that day and has not been heard from since.

Investigators treated his disappearance as suspicious from the outset and have said the case remains under review as investigators apply new technologies and techniques. Family members, particularly his mother, have continued public appeals for information, and police ask anyone with even small details to come forward.

What small detail about that day or the weeks around it might help bring Clayton’s family closer to answers?