The police can only arrest, and prosecute, you for driving with a blood alcohol concentration of .08 or above, a single, 12 ounce bottle of beer should not generate a .08 or above. Many forensic toxicologists use .025 as the blood alcohol concentration added by a 12 ounce beer. If you only drank one beer and your blood alcohol concentration was over .08 you should speak to a physician as this is not normal and be indicative of a serious health issue.
Answered on Mar 12th, 2013 at 11:58 AM