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A Minnesota error using wrong breath test cylinders may invalidate over 275 DWI cases since 2020.
A procedural error in Minnesota has cast doubt on over 275 breath tests used in DWI cases across four counties, as the state’s Bureau of Criminal Apprehension found that cylinders meant for portable breath testers were mistakenly used in more advanced DataMaster DMT machines.
The mistake, which may have affected cases dating back to 2020, raises concerns about test accuracy due to incompatible calibration methods.
The BCA has launched a statewide inspection, paused DMT use temporarily, and is reviewing affected cases as prosecutors and defense attorneys assess impacts.
Officials stress that improper cylinder use or data entry can invalidate results, and only BCA-provided cylinders ensure reliable, traceable testing.
Un error de Minnesota utilizando cilindros de prueba de aliento incorrectos puede invalidar más de 275 casos de DWI desde 2020.