Probable cause can be almost anything that would indicate that a crime has been committed or may be committed if authorities don't take action. For example, if an officer sees your car driving on the wrong side of the road, that officer may initiate a traffic stop. If there is an odor of alcohol coming from your breath, it may be grounds to take you into custody for drunk driving or being drunk in public. Even if there is no probable cause for a search or seizure, a search may be conducted if you give permission for one to occur.