In October, gardaí began a major search operation to locate the remains of Deirdre Jacob on the Wicklow-Kildare border.  Deirdre is one of several women, including Jo Jo Dullard, who went missing over a five-year period in the 1990s in an area that became known as the vanishing triangle. It is a major development in a mystery that has haunted society for more than 20 years.  Host: Kevin Doyle Guest: Catherine Fegan: the Irish Independent Special Correspondent  

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