Conspiracy of Silence is a 1991 Canadian television film, presented in a two-episode miniseries, based on the true story of the murder of Helen Betty Osborne, a Canadian cold case that was legally resolved after roughly twenty years of inaction. The film was aired in 1991 by the Canadian Broadcasting Corporation, but never subsequently released on VHS or DVD. Michael Mahonen, one of the primary cast stars from the film, later released it for free to his own channel on YouTube, which is the only public copy available not privately stored in CBC's archives. Actress Michelle St. John, better-known for her voice role as Nakoma in the Disney Pocahontas franchise, played the role of Helen Betty Osborne. It was awarded Best Dramatic Mini-Series at the 7th Gemini Awards, among seven total wins.