Driver stopped for multiple marked lanes violations after police notice he does not immediately yield lane for approaching ambulance. Driver is adamant that he is not impaired, but police arrest him following field sobriety tests. Post arrest breath test evidence .12 is excluded due to defense challenge to scientific reliability of breath test equipment and calibration protocol. OUI charge dismissed on day of trial for lack or prosecution. Collateral consequences and enhanced penalties of Melanie’s Law Lifetime Lookback provisions avoided.