Examining three of the most notorious miscarriages of justice from the 1970s and 1980s, drawing links between them and looking at the methods of the Garda. The first case is from 1971, when 19-year-old Una Lynskey vanished without a trace near her home in Co. Meath. Garda charged three local men with her disappearance, but they claimed their confessions were coerced