Yesterday was the 40th anniversary of one of the most notorious crimes in the Shannonside region.
Roscommon priest Niall Molloy was brutally killed in Clara, Co Offaly, in the home of Richard and Therese Flynn.
No one has ever been convicted of the 52-year-old's death.
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Former chief superintendent, Christy Mangan, examined the case when he was head of the garda serious crime review team.
He has been speaking to Eoghan Murphy about his two-year examination, which started in 2010.