I was driving my intoxicated friends vehicle, when we were pulled over for crossing the fog line, per the officer 3 times. The officer approached the passenger side of the vehicle, where I had rolled the window (electric) down about half way. I told the officer, my friend was sick and I was taking him home. He asked me how much I had to drink and I told him zero. He said he smelled alcohol and asked me to step out of the vehicle. I told the alcohol odor was from my friend. He asked i do the field and blow test. I declined, He arrested me and took me to the station. After consulting a on call public defender, I refused the 2nd in station breath test. What are my chances of beating this DUI. I have a otherwise clean driving record.