Patrick Quirke, 50, was jailed in May after jurors at the Central Criminal Court found him guilty of the murder of Bobby Ryan, 52, by a majority of 10-2.

Mr Ryan’s son and daughter are now planning to sue Mr Quirke, whose finances were the subject of speculation during the criminal trial, the Irish Independent reports.

It is believed that the siblings will seek damages for the suffering and distress caused by their father’s disappearance and murder.

Mr Ryan disappeared in 2011 and his body was not discovered until 2013.