Breathalyzer Error Impacts DWI Tests in Winona County
Winona County is dismissing 39 DWI charges due to an issue with a breath test machine at the county jail.
A cylinder was incorrectly installed in the DataMaster Transportable (DMT) breath test machine, according to Winona County Sheriff Ron Ganrude.
- The error was discovered by the Minnesota Bureau of Criminal Apprehension (BCA) in September.
- The issue involves a Preliminary Breath Test (PBT) cylinder that was incorrectly installed in the DMT machine.
- PBTs are used by officers to establish probable cause for an arrest, while DMTs provide more accurate results.
The cylinder got changed starting in June of 2025.
As a result, Winona County will drop nearly 40 DWI charges and convictions.
Author's summary: Winona County dismisses 39 DWI charges due to breathalyzer error.
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