20/20 S42E06 - The DNA Detective

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Teacher's gruesome 1992 death launches decades-long mystery; Pennsylvania teacher's 1992 death grows cold

Genres: Documentary , News

Keywords: magazine-show , tv-shows-online , crime , crime-documentary , news-magazine

Cast

  • Amy Robach
  • Elizabeth Vargas
  • David Muir
  • Deborah Roberts