If they took a blood test, then the results of the blood test should be available at your initial hearing. If nothing was in your system, then it is likely that they will drop the charges. You can be charged with a DUI from an officer's testimony alone, such as testimony regarding whether your speech was slurred, your eyes were glassy or bloodshot, there was an odor of alcohol, etc. However, such testimony would be hard to uphold if the blood test shows nothing in your system.
Answered on Oct 25th, 2013 at 8:23 AM