Minnesota’s breath testing system is under close review after investigators found mistakes in how some DataMaster instruments were maintained and calibrated.
If you recently faced a DWI arrest, you may wonder if these issues could affect the evidence in your case. Knowing what happened and how courts treat breath test results can help you understand your options.
Background of the error
Statewide attention grew after defense counsel in Aitkin County discovered that an officer documented a calibration procedure. However, it was then later discovered that he actually did not perform the procedure.
That single finding prompted the Minnesota Bureau of Criminal Apprehension (BCA) to inspect instruments across the state. Similar issues surfaced in Winona, Chippewa, Hennepin and Olmsted counties, where officers entered incorrect gas cylinder information or failed to complete required steps.
Although the machines themselves remain reliable, the BCA temporarily suspended the use of all DataMaster instruments until each one could be checked. The agency also shifted all future calibration and gas cylinder installation duties to BCA personnel instead of local officers.
How calibration problems may affect your DWI case
Errors do not automatically invalidate every breath test. However, they do open the door to challenges.
Minnesota law says the state must prove that officers properly maintained the breath test instrument and followed all required steps. If they provide incomplete or inaccurate records, a court might limit or reject the test result.
To see if this recent development would affect your case, keep these points in mind:
- Officers must back breath test results with correct calibration data and complete documentation.
- Courts usually require proof that officers completed every required step as recorded.
- Tests done during the period of review may need closer examination of maintenance logs.
- A lawyer can check the calibration records, officer reports and video evidence for any mistakes.
Looking at these factors can help you understand whether the breath test evidence in your case meets legal standards.
Take control of your case
This statewide review shows how important proper maintenance and accurate records are in DWI cases. If your arrest happened while these calibration errors were happening, having a legal professional examine your test records could be important. Reliable evidence is key, and knowing the strength of the state’s case helps you make the best decisions moving forward.