A controversial documentary making its TV premiere this weekend tells the story behind the murder conviction of Ryan Ferguson in 2005. The project, “Dream Killer,” bows Sunday, Aug. 14, on Investigation Discovery.

Ferguson was sentenced to 40 years in prison based on the testimony of his friend Charles Erickson, who claimed he witnessed the brutal murder in his dreams. “Dream Killer” will air as part of the cable net’s ID Films documentary strand.

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