The Minnesota Bureau of Criminal Apprehension has verified that DWI breath test results previously suspected to be invalid are accurate, the bureau said Friday.

The BCA had ordered all law enforcement agencies in the state to suspend usage of DataMaster instruments earlier this month until they verified that data was correctly entered into each instrument. Errors had been “identified … in particular when changing out a dry gas cylinder that is used for a control test,” said BCA Superintendent Drew Evans at the time, calling into question whether the control tests were valid in hundreds of cases.

“As I said before, we stand behind the instruments and the validity of the testing and the reliability of the instruments across Minnesota,” Evans said at a press conference Friday. “And our scie

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