Here is the trailer for a documentary written and directed by Gemma O'Doherty about the case of Ireland's youngest missing person. Mary Boyle vanished on her grandparents' remote farm in Donegal in March 1977.
Mary was just six years of age. Her remains have never been found. The documentary reveals allegations by retired senior officers that a politician requested the chief suspect not be arrested. He never has been and still lives in Donegal today.
Mary Boyle's twin Ann claims that her sister was going to reveal a secret. She says she was murdered to stop her from telling it.
You can see the trailer below, and see the entire documentary on Youtube here: https://www.youtube.com/watch?v=0vGORoCbpXw ;