It's one of the oldest unsolved missing person cases in Edmonton's history.

Dylan Koshman disappeared on October 11, 2008 after leaving his house, following a fight with his roommates.

The fifth estate talks with family, witnesses and police and this Friday we bring you a significant development in the case.

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About the fifth estate : For four decades The Fifth Estate has been Canada's premier investigative documentary program. Hosts Bob McKeown, Gillian Findlay and Mark Kelley continue a tradition of provocative and fearless journalism. the fifth estate brings in-depth investigations that matter to Canadians – delivering a dazzling parade of political leaders, controversial characters and ordinary people whose lives were touched by triumph or tragedy.