Breathalyser tests here were overestimated by almost one million over a five year period
A report conducted by a assistant Garda Commissioner Michael Sullivan, and is expected to be published next month
The Sunday times says an internal Garda investigation shows breath test figures were made up, input incorrectly and contained administrative errors.
Authors of the report also say Gardaí were not informed by the Medical Bureau of Road Safety about the issue.
The MBRS say they had alerted Gardaí of the problem with breath test numbers in 2014, but declined to comment to the paper.
More from Cork
Iarnrod Eireann expect all services from Cork to return to normal tomorrow
All routes were cancelled in response to Storm Ophelia today
Anyone who leaves their home today are putting their lives at risk
That's the message from Gardai in Cork who are urging the public to stay indoors and be safe
Red Weather warning for Cork remains in place
The Cork City Council crisis management team are reminding the public that wind speeds remain significant
Over 5,000 passengers were impacted today at Cork Airport
It's after a significant day of cancellations and delays to flights
Over 100,000 people across Cork City and County are without power
Storm Ophelia continues to batter the country with severe winds
All Irish Rail services in Cork have been cancelled this evening
Track maintenance crews are currently clearing trees and branches from the lines