Police respond to citizen cell phone report of erratic driver. Officer stops vehicle matching description in report after confirming several marked lanes violations. Driver is cooperative but speaking only Spanish. Officer notes open container in vehicle, and the driver’s slurred speech, glassy, blood shot eyes and odor of alcohol from his breath. Defense is prepared to challenge accuracy of field sobriety tests without interpreter. DWI charge dismissed prior to trial. Lifetime Lookback consequences of Melanie’s Law for Massachusetts resident avoided.