In the recent matter of Commonwealth v. Hourican, the Appeals Court reversed a trial judge’s denial of a motion to suppress breathalyzer test, ruling that the test results were invalid under state regulations. The Appeals Court’s decision is a significant victory for Massachusetts OUI defense attorneys as the Court placed a greater burden on the Commonwealth requiring prosecutors to offer more reliable evidence to establish a defendant’s BAC level to reach a conviction.
The defendant in Hourican was operating a pickup truck late at night when he collided with a Boston police patrol wagon. A Boston police officer observed signs of intoxication and arrested the defendant after the defendant failed multiple field sobriety tests. The defendant later consented to two breathalyzer tests, the first read a BAC level of .121 percent, and the second read .143 percent. The breathalyzer device used was the “Alcotest 9510”.
Although both results were above the statutory limit of .08 percent, the results were problematic in that they differed by .022 percent. Massachusetts state regulations provide that a breath test sequence (two consecutive tests with a time lapse of a few minuets in between) is only valid if the results are within +/- .02 percent of one another.