The Minnesota Bureau of Criminal Apprehension (BCA) recently confirmed the accuracy of evidentiary breath test results following concerns about DataMaster (DMT) instrument errors. These machines are a keystone in the state's DWI testing apparatus. The issue initially arose when DMT operators incorrectly inputted alcohol concentration values from replacement dry gas cylinders, casting doubt on the reliability of several control tests.
After uncovering the problem in September, the BCA acted swiftly, embarking on a meticulous process to recheck the results of hundreds of cases potentially tainted by the error. As mentioned in a statement on October 31st, BCA lab scientists recalculated the tests using the correct cylinder values, ensuring each was within acceptable accuracy margins despite the data errors. This action preserves the integrity of the breath tests administered after these corrected control changes.
Moving to seal the problem at its source, the BCA has announced changes to the DMT instrument maintenance protocol. They have effectively stripped law enforcement of the authority to replace dry gas cylinders, a task now reserved exclusively for BCA personnel. Notified of these updates, police agencies and prosecuting attorneys now remain on standby for the ramifications of the testing mishaps.
Moreover, the BCA is tightening security measures around the DMT instruments, limiting access to specific compartments to prevent unauthorized handling. According to their website, over half of the machines have been checked and secured, with full compliance anticipated in the weeks ahead. These new measures are reflected in the updated DMT operator training programs to certify the future accuracy of DWI tests.
For individuals and legal professionals seeking further details or updates on this situation, the BCA has noted that any new information will be made available on its website.
