The inquest into the murder-suicides of a father and his two sons is taking place in Co Cork today.
25-year-old Mark O'Sullivan was shot dead by his father and younger brother in their family home in Kanturk last October.
59-year-old Tadg and 23-year-old Diarmuid were found dead nearby shortly after.
The mother of the house, Anne O'Sullivan, survived the tragedy but died of cancer in April.
Ralph Riegel, from the Irish Independent, says her will was the cause of the murder-suicides.
"We believe that the tragedy was sparked by a family row over a will.
"What we expect to come out in the evidence today is ballistic evidence about the number and type of shots that were fired, background details on the nature of the family dispute, and forensic evidence about the precise circumstances and timeline that unfolded as those three men lost their lives."
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