Police respond to investigate report of driver slumped over wheel.  Police find driver at long line of traffic stopped at traffic light.  Driver’s side door is open and driver appears to be conscious with her head down.  Police note slurred speech and an odor of alcohol.  Driver admits she had two glasses of wine and is heading home.  She denies medical attention and also refuses field sobriety testing.  A short time later the driver appears relatively normal in segments of booking video.  DWI charge dismissed prior to trial.