Client stopped by police following several civilian cell phone reports of erratic operation. Police allege client failed standard field sobriety tests and placed in custody at roadside after 7:40 p.m. Post arrest breath test administered at police station results in .20 BrAC reported at 8:03 p.m. Court allows defense Motion to Exclude Breath Test Evidence because government cannot establish a valid fifteen (15) minute waiting observation period preceded breath test, in light of arrest time, travel and transport to station and reported test time.