Driver involved in rear end collision on busy roadway in heavy bumper to bumper traffic. Officer notes driver exhibits red/glassy eyes and an odor of alcohol and marijuana. Driver hands over empty MJ pipe and admits to having one IPA beer immediately before crash. Driver participates in HGN test but tells officer he’s not comfortable participating in any other tests. He refuses post arrest breath test. Defense prepared to offer multiple versions of various officers’ body worn camera footage. DUI charge dismissed day of trial. Lifetime lookback reciprocity impact from MA RMV for MA resident with prior OUI history avoided.