A witness is anyone who observes anything. Literally, in a DUI or other Criminal Case the police officers are the star witnesses because their observations form the foundation for your arrest as well as the basis for criminal charges against you.
For example, in a DUI arrest the officer’s observations thesdriver had been weaving or lane straddlingsprovides the probable cause or legal reason for the traffic stop. Although police officers are supposed to be neutral and unbiased civil servants whose job is to protect and serve, that’s not always the case. A police officer’s job is also to build a criminal case for the prosecutor when they suspect a criminal or vehicle code violation has occurred.sThis can cause one to question the written the neutrality of their observations and opinions.
Theoretically, a defendant in a DUI criminal case is also a witness, but often their statements or recall of events is seen as suspect because it is often tainted because of their perceived bias to minimize or eliminate any responsibility on their part.