There are several points in time during an arrest for a DUI in which an experienced DUI attorney can challenge the actions of a police officer. The determination of probable cause for the initial stop, the determination of probable cause for the initial investigation into a suspect's intoxication, the rationale for the arrest...all are stages that can be challenged. If you were followed for 25 blocks and did not do anything behind the wheel to lead the officer to believe you were intoxicated,...