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43:07Now PlayingIn December 1979, 18-year-old Michelle Martinko was stabbed 29 times in a mall parking lot in Cedar Rapids, Iowa. For 39 years, her killer evaded justice, until Detective Matt Denlinger, whose own father had been the lead investigator in 1979, used genealogical DNA technology to identify Jerry Lynn Burns, who was convicted of first-degree murder and sentenced to life without parole.
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