Forensic Files

What Ever Happened to Mary Day? | Full Episode

48 Hours

  • Nov 22, 2022
  • 42:00
  • Full Episode

A 13-year-old girl vanishes in 1981. Detectives believe she was murdered. Years later, a woman appears and claims to be the missing girl. Is she an impostor? "48 Hours" correspondent Maureen Maher reports. Watch more full episodes of "48 Hours" on Pluto TV.

Crime. Social justice. Impact. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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Brief Summary

Mary Louise Day disappeared in 1981; her case reveals family secrets and a shocking twist when she was found alive in 2003.

Key points

  • Mary Day's Mysterious Disappearance. Mary Day vanished in 1981, leaving no trace for over two decades. Her family's silence raises questions.
  • The Shocking Discovery. After years of searching, police receive a call that Mary Day has been found alive.
  • DNA Confirms Identity. A DNA test reveals that the woman claiming to be Mary Day is indeed her, closing the case.
  • The Imposter Theory. Mark Clark presents a theory that the woman claiming to be Mary Day is actually her secret sister.
  • DNA Evidence. New tests show Mary's DNA matches both Charlotte and her birth father, complicating the case.
  • Final Meeting. After years of investigation, Sherry finally meets the woman claiming to be her sister.

Tension

75/ 100High tension

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