When a Winnipeg teenager was found savagely attacked in a donut shop, investigators arrested a B.C. man who was visiting the area. After serving nearly four years behind bars, he was suddenly released, prompting some people to question if a murderer had now walked free. As Jules Knox reports, years later, another slaying of a teenage girl halfway across the country gave fresh light to old evidence that could help convict a killer.

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On May 14, 1971, just after dinner, six-year-old Ljubica Topic wandered off while playing outside with her older brother and some friends. When her brother gets home, Ljubica isn't there. Questioned by his mother, he reveals that a stranger had approached them asking for help and Ljubica had gone off to assist. After a frantic search, the young girl is found dead just a kilometre away. Who did this and why did it remain a mystery for nearly 50 years?