Over the past several years, there has been extensive litigation in Massachusetts regarding a specific kind of breathalyzer machine called the Alcotest 9510 device. Challenges to this machine have revealed malfunctions and inconsistencies in the breath test results that the Commonwealth has consistently used in criminal proceedings.
Because of the Alcotest litigation, we now know that many defendants may have been unfairly convicted of driving under the influence (DUI) or operating under the influence (OUI). Breath test results from the Alcotest 9510 produced between June 2011 and April 17, 2019 are now banned from being entered into evidence in criminal cases. How does this reality affect criminal defendants who pled guilty to such a crime during the relevant time period?
Withdrawing Pleas in General
Under Massachusetts law, it is possible to withdraw a guilty plea under certain circumstances. Rules of criminal procedure say specifically that a defendant may successfully petition to withdraw a guilty plea if it appears that “justice may not have been done” at the trial stage. Courts can interpret this language however they see fit.