Independent TD Mick Wallace has said there must be a public inquiry into allegations that gardaí inappropriately cancelled penalty points and fines.
Speaking RTÉ's Morning Ireland, Mr Wallace said he has seen evidence that over 50,000 speeding fines alone were terminated.
He also said close to another 50,000 fines of a different type were terminated by different senior gardaí around the State.
Mr Wallace said the Garda Commissioner should not be allowed to investigate the allegations.
He said he acknowledges that there are good reasons whereby a fine could be terminated, but the rules dictate that this should go through the courts process.
He called for an explanation as to why some superintendents have only terminated a handful of fixed charge penalties in three years, when one particular individual has terminated over 1,000.
Mr Wallace said there should not be a situation where the commissioner was investigating himself.
"What happened was that when the Garda gave the report to the confidential recipient, he then gave it to the minister and the minister then gave it to the commissioner.
“The commissioner is the one being questioned so then you have the commissioner investigating himself”.