McCarrick she left her home in Sandymount, Dublin, Ireland on March 26, 1993 to spend a day in the Wicklow Mountains. She travelled by bus to Enniskerry, just east of the mountains, and was last seen there. Later, there was an unconfirmed sighting of her at Johnnie Fox's Pub in Enniskerry, with a man in his twenties. Police are not sure if the woman in the pub was in fact McCarrick, but she had visited that pub before.

McCarrick has never been seen or heard from again, and police believe she was murdered. She was carrying a tan shoulder bag when she went missing. Her disappearance is thought to be related to the disappearances and murders of several other women in and around Dublin during this period; investigators think McCarrick may have been the victim of a serial killer. Her case remains unsolved.

McCarrick was born and raised in Long Island, New York but moved to Ireland in 1987. She studied to be a teacher at St. Patrick's Training College in Drumcondra, Dublin, and later at St. Patrick's College in Maynooth. She went back to America in 1990 but returned to Ireland in January 1993 to settle. The Charley Project is profiling her case because she is an American citizen.