Nancy O’Sullivan: Cook County girl vanished in 1974, police renew effort to solve case

The Brief

  • Nancy O’Sullivan, a 15-year-old freshman at Homewood-Flossmoor High School, disappeared on March 7, 1974.
  • The Homewood Police Department is using the 51st anniversary of her disappearance to seek new information.
  • Authorities encourage anyone with knowledge of the case to come forward, even if they believe their information is minor.

HOMEWOOD, Ill. This week marks 51 years since Nancy O’Sullivan, a teenager from south suburban Homewood, vanished without a trace.

Now, the Homewood Police Department is using the anniversary as an opportunity to generate new leads in a case that has remained unsolved for more than half a century.

What we know:

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