Defenses Related to "Driving"
If you weren't actually driving a vehicle at the time of the alleged DUI or DWI offense, you can't be convicted of drunk driving. Most DUI and DWI cases start with a driver getting pulled over, so there usually isn't much argument over whether the defendant was actually driving.
Defenses Related to the Arrest
If the police officer did not have legal justification to stop your vehicle and/or arrest you in the first place - or if the officer failed to follow proper legal procedures during the arrest - any evidence gleaned from the traffic stop or the arrest might be deemed "inadmissible" and, therefore, kept out of a court case against you. This could leave the prosecution with no real case and the DUI or DWI charges against you could be dropped.
If you weren't actually driving a vehicle at the time of the alleged DUI or DWI offense, you can't be convicted of drunk driving. Most DUI and DWI cases start with a driver getting pulled over, so there usually isn't much argument over whether the defendant was actually driving.
Defenses Related to the Arrest
If the police officer did not have legal justification to stop your vehicle and/or arrest you in the first place - or if the officer failed to follow proper legal procedures during the arrest - any evidence gleaned from the traffic stop or the arrest might be deemed "inadmissible" and, therefore, kept out of a court case against you. This could leave the prosecution with no real case and the DUI or DWI charges against you could be dropped.