Legal Question in DUI Law in Wisconsin

DUI--Officer Left PBT Testing Mouthpiece in Car

The only field test an officer would give you which utilized a disposable mouthpiece would be a "PBT" or preliminary breath test. That test result is not admissible in court in any event, except to establish probable cause for your arrest. The only thing which might be proven by his forgetting it might be a slight level of forgetfulness. A good attorney might be able to use that to your advantage in cross examining the officer if he asserted that he had a perfect recollection of all the events that evening. Few officers would ever claim this, since they have far too many arrests to rely upon their memory without reviewing their reports.