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Dateline Season 29 Episode 9 A Promise to Helene 2020

When college student Helene Pruszynski is found murdered, her case remains cold for nearly 40 years until a new detective uses an innovative method to catch the killer. Josh Mankiewicz reports.

  • Released: 2020-10-16
  • Runtime: 43 minutes
  • Genre: News, Documentary
  • Stars:
  • Director:

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