The Taoiseach says he is concerned about the fallout of the secret recordings in garda stations and it could have implications even for Tribunals.
Enda Kenny says defence lawyers will be interested and already a case has been adjourned. He says that is why a Commission of Investigation has been established.
The extent of the problem will not be known until tapes are transcribed and they find out how many hours of recordings have been stored digitally since 2008.
Mr. Kenny and the Taniste Eamon Gilmore told reporters at an event to mark Intel's 25 years in Ireland that the fallout could be significant.
Meanwhile a member of the Public Accounts Committee (PAC) says Martin Callinan and his predecessor should be called in to answer questions.
Independent TD Shane Ross says it now appears recording equipment bought by the gardaí in 2007 was used for illegal means.
And he is calling on the last two Garda Commissioners to be brought before the PAC to explain what they knew about how the equipment was used.
It comes as the Special Criminal Court is due to be informed today whether gardaí recorded the phone calls of two IRA membership suspects.