When a 20-year-old English tourist suddenly stops contacting his family while backpacking across Canada, his mother tries to raise the alarm. Police are slow to respond until an anonymous note prompts them to search a nearby lake. When a body is found, there is hope that it will help bring closure to the missing man's family. But as Jules Knox reports, another twist in this story means that the case can't be so easily closed.

On a breezy winter day in February of 2002, in southern Alberta, a rancher was moving some cattle along a rural road when he came across a disturbing sight in the ditch. As he got closer, he was able to confirm it was a body. At the same time, an hour's drive North, in Calgary, family and friends of Adrienne McColl had no idea the heartbreaking news they were about to get– and the long road to justice they were about to embark on.