Alleged drunk driver faces enhanced penalties (mandatory jail time and increased loss of license) for Aggravated DWI charge as result of breath test in excess of .16 (twice legal limit of .08) Defense excludes evidence of .23 breath test when breath test operator testifies that required twenty (20) minute observation period at station preceding breath test began at 7:40 p.m. Arresting officer establishes arrest time in street at 7:45 p.m. making valid twenty (20) minute observation period at station an impossibility. Not guilty verdict on Aggravated DWI charge following trial.