The Taoiseach, Bertie Ahern, has said he will again raise with Sinn Féin the killing of 29-year-old Joseph Rafferty.
Mr Rafferty was shot dead after leaving his apartment in west Dublin last April.
His family believe he was shot dead by people connected to the IRA and that Sinn Féin could be helpful in solving the case.
Mr Ahern said the garda investigation was continuing to try to bring those responsible for the killing to justice.
