Mary Boyle was only six years old when she disappeared from a remote part of County Donegal on March 18, 1977. What should have been an ordinary family visit became the beginning of one of Ireland's longest-running and most controversial missing-child cases. Almost half a century later, Mary has never been found, no one has been convicted in connection with her disappearance, and questions remain about what happened during the few minutes in which she seemingly vanished. Mary was born on June 14, 1970, and lived with her family in Belcruit, Kincasslagh, County Donegal.