Dateline NBC

A Promise to Helene

TV-14
S29 • E9    Oct 15, 2020    43m
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.

Where to Watch A Promise to Helene

Cast of A Promise to Helene

  • Lester HoltSelf - Host

 

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