The Dáil is to debate a motion seeking to have the terms of reference of the Morris tribunal widened.
The wording of the motion calls on the Government to seek the consent of Mr Justice Morris for a widening of the terms of reference of the tribunal, which is investigating alleged corruption by some members of the Garda in Co Donegal.
It also calls on the Government to enter into negotiations with the McBrearty family on acceptable arrangements to allow them to be legally represented for the duration of the tribunal.
The Labour Party spokesperson on Justice, Mr Joe Costello, said today it was now clear the terms of reference agreed by the Dáil were too limited to allow the comprehensive inquiry required to deal with what are probably the "most serious allegations of Garda misconduct ever to have been made in the history of the State".