Sinn Féin is seeking clarification from the Justice Minister Alan Shatter on his sources of information regarding the allegations against Wexford TD Mick Wallace.
In a live televised debate on Thursday, Alan Shatter accused Mr Wallace of having had a traffic violation quashed by gardaí.
Following criticism from the Wexford TD, Mr Shatter issued a statement saying he felt the revelation was a "matter of public interest".
Sinn Féin's Justice spokesperson Padraig Mac Lochlainn said that the Ministers actions were inappropriate.
"It is very worrying that a Minister for Justice can go on Prime Time and use information which he says comes from An Garda Síochána, to score a political point against a Dáil colleague," said Deputy MacLochlainn.
"The Minister must explain how he came by this information and clarify that it is not hearsay.
"Did he seek it out from gardaí in Mick Wallace's constituency? Did he hear it by chance during a social encounter? Was he given the information unsolicited by the garda who allegedly stopped Deputy Wallace for enfringement of a traffic law but did not press charges?
"Is it appropriate that the Minister for Justice should use information gleaned in the course of his work in this manner or if the information was not received through official channels, should it be repeated on prime time television to score a political point?
"I believe that it is not appropriate and that the Minister must make a statement."