Police stop moped operator for faulty headlight. Driver admits to consuming 3-4 beers and he takes field sobriety tests, passing the one-leg stand test but failing the walk and turn and HGN test. Portable Breath Test (PBT) on scene is .08. Post arrest breath test .07 BrAC. Defense prepared to argue PBT is inadmissible. DWI charge dismissed prior to trial.