Senior garda's points quashed six times
Over a third of cases flagged by whistleblower Maurice McCabe with garda authorities investigating alleged garda penalty abuses were deemed to be sufficiently suspicious to warrant further investigation.
The Garda Professional Standards Unit (GPSU) report looked at 239 cases highlighted by Sgt Maurice McCabe, relating to 115 individuals.
Some 91 cases were found to require further investigation, including five which dated from after Garda Commissioner Nóirín O'Sullivan's tightening up of penalty point cancellation rules last year.
A further 60 cases - a quarter of those highlighted by Sgt McCabe - were described as instances of "lenient decision making".
Sgt McCabe was particularly concerned about repeat offenders when he identified cases to the GPSU.
One case requiring further investigation involved a now retired superintendent who had points cancelled on six occasions.
She was caught speeding, but claimed to be travelling on official duty.