Nancy Marie O’Sullivan was 15 when she vanished from South Holland, Illinois, on March 7, 1974. Her family had been living in nearby Homewood for about two years; Nancy was visiting a family on the 1300 block of 168th Place in South Holland, next door to her former home, when a friend reported seeing her walk to the end of his driveway and accept a ride in a blue Cadillac. She had a history of brief runaways, but this time she left behind her purse and makeup and did not return.

For more than three decades the case was treated as a runaway, a classification that affected the early investigation. Over time authorities concluded the voluntary-departure theory became less likely and now consider Nancy an endangered missing person and suspect foul play. One person Nancy visited that day was later described as having a drug addiction and another as having a reputation for violence; two of the family’s three sons have died and the third was too young then to provide details. The Homewood Police Department continues to list the case as active and asks anyone with information to get in touch.

Did anyone in the South Holland or Homewood area remember seeing Nancy or that blue Cadillac in March 1974?