Nancy Marie O’Sullivan was 15 and a freshman at Homewood-Flossmoor High School when she vanished on the evening of March 7, 1974. She had gone back to her family’s former neighborhood in South Holland to visit friends and was last seen in the 1300 block of East 168th Place. A friend reported that Nancy walked to the end of his driveway and accepted a ride in a blue Cadillac; she never returned home.

Nancy had run away before, but previous episodes were brief and she always came back. On this occasion she left behind her purse and makeup, items her family said she would not have intentionally abandoned. Years later investigators began to consider the possibility of foul play. Friends visited that night include one reported to have struggled with addiction and another described as having a reputation for violence; two of the boys and their parents have since died, and a younger sibling of one has no memory of the evening.

There was some speculation she might have tried to travel to Texas, and the Homewood Police Department has periodically renewed public appeals and reviewed school records and the original police report as the family continues to seek answers. Does anyone who knew Nancy, lived in that neighborhood in 1974, or remembers a blue Cadillac seen that evening have information to share?