Forensic Files: If a perpetrator leaves a shoe print in the mud, investigators use established techniques to made a mold of the shoe impression for later identification. But what happens if the impression is left in the snow? Here's the story of one Canadian investigator, whose quick thinking and knowledge of science enabled him to capture a shoe impression made in snow, before the evidence melted away. Watch Forensic Files to get the answer.
Peter Thomas
Crime, Documentary
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