Driver stopped at Massachusetts State Police Roadblock outside Boston. Greeting Trooper detects odor of alcohol and driver admits that he consumed two beers in Cambridge. Ordered to “pit” area for Field Sobrity testing. Defense challenges Probable Cause to arrest because client passed one-leg stand test and walk and turn test without displaying typical signs of impairment like slurred speechc and glassy/red eyes. Court agrees evidence of Portable Breath Test and Horizontal Gaze Nystagmus are inadmissible. Post arrest Breath Test result .10 BrAC. Motion to Suppress allowed, no probable cause to arrest found, OUI Charge dismissed.