A prosecution is expected in relation to the fatal shooting of Denis Donaldson in Co Donegal in 2006, the Minister for Justice has said.
Jim O'Callaghan made the statement following a meeting with Mr Donaldson's daughter, Jane Kearney.
"It has now been nearly 20 years since Denis Donaldson was killed near Glenties, Co Donegal in April 2006," he said in a statement.
"It is a matter of regret that it has not yet been possible to bring those responsible to justice.
"I met today with Mr Donaldson's daughter, Jane Kearney, her husband, Ciaran, and their solicitor to hear directly their concerns regarding the investigation into Mr Donaldson's killing.
"I assured the Donaldson family that the garda criminal investigation into Mr Donaldson's killing remains active and open," Minister O'Callaghan said.
He added that he has been informed by gardaí that directions have been received to "prosecute an individual for offences in this case" and "proceedings are under way in this regard".
"In those circumstances, I conveyed to the Donaldson family that I did not consider it appropriate to establish a separate commission of inquiry," he said.
"I emphasised the importance of allowing An Garda Síochána to continue its investigation with a view to bringing the individual before the courts as soon as possible. I reaffirmed the absolute commitment of An Garda Síochána to this outcome."
