Máire Whelan may be quizzed on why it took her so long to inform her colleagues about the Garda tapes
She's also reported to have told former Commissioner Martin Callinan that all recordings made in Garda stations were not to be destroyed – something that sources close to Mr Callinan reportedly say he hadn't considered doing.
It comes as the Dáil will begin debating a motion of no confidence in the Minister for Justice today.
The Fianna Fáil motion will claim that the recent scandal surrounding the Garda Tapes has left Alan Shatter unfit for office.
Justice spokesman Niall Collins says the public has lost confidence in him.
Staying with the garda tapes issue and details have emerged today of an inventory of tapes from Garda station recordings around the country.
The Irish Times says the internal research was compiled in February, and is in two parts.
The first relates to dictaphone recordings made before 2008, and lists the number of tapes stored from Garda divisions, with Louth having the highest total at 356.
The lowest number came from Donegal at 31.
The figure for Tipperary was 185.
According to the paper, the second half of the inventory relates to recordings made on solid-state equipment since 2008.