The Massachusetts Supreme Judicial Court heard oral argument in the case of Commonwealth v. Davis. The Justice had to determine what is the standard to determine if there is probable cause to arrest a driver for being impaired by marijuana. In the Davis case, the defendant was stopped for speeding, the car smelled of marijuana, the officer said that his speech was delayed and the arresting officer formed the opinion that the defendant was impaired by marijuana. The oral argument before the SJC revealed the following questions and areas of concern for the Justices.
Justice Link suggested that the officers did not have much evidence to make that conclusion that the defendant was impaired by marijuana. The Commonwealth disagreed contending that the officer had more than sufficient evidence to conclude that the driver was impaired. Davis’ lawyer argued that the officer should have conducted some field tests to perform a better investigation to determine impairment. Justice Lenk questioned the Commonwealth about how much the smell adds to the analysis because it can be long after consumption.
On the issue of probable cause, the Justice seems to suggest that if it were an alcohol case there would be enough probable cause to arrest. Justice Gaziano suggested that the SJC allows field sobriety tests into evidence in Gerhardt because it informs the officers opinion regarding the probable cause to arrest. He questioned the lawyer for the defendant that if the car smelled like alcohol, we would allow the officer to arrest; in this case it smells like marijuana, so the same inference of impairment he asked if that should be permitted. The defense lawyer skillfully argued that marijuana is different and the Court cannot tell if the person is impaired. The studies on marijuana suggest that a driver would drive slower if under the influence of marijuana and not faster as the defendant in this case.