MA driver stopped by police following a 911 call reporting erratic operation on the highway. Defendant is arrested following stop and field sobriety tests. Refuses post arrest breath test. Defense files Motion to Suppress arguing stop of vehicle lacked reasonable suspicion as description of target vehicle from 911 caller was vague and police did not corroborate erratic operation or actual vehicle identity before making stop. Criminal DWI charge dismissed prior to trial and hearing on Motion to Suppress.