Minnesota Bureau of Criminal Apprehension Superintendent Drew Evans said Friday that agency scientists are prepared to testify to the accuracy of questionable breathalyzer tests after a ‘mathematical recalculation’ of each test to correct for data entry errors.

On Oct. 10, the BCA asked law enforcement agencies to temporarily stop using the state’s fleet of DataMaster alcohol breath-testing machines after calibration errors rendered hundreds of DWI tests in multiple counties legally inadmissible.

The following week, Evans said that the problem was not with the machines, but that some local law enforcement officers had incorrectly entered alcohol concentration values printed on gas cylinders that are used to provide control samples.

At a news conference, Evans said that BCA laboratory sc

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