Police officers as expert witness....are tire skid marks a clue that your drunk?

A police officer as an expert witness, based on her 5 years of experience working traffic patrol and arresting drunk drivers. As an expert witness, the officer will testify that, in her opinion, defendant was extremely intoxicated and beyond the legal limit for drinking and driving. Even though the defendant never took any blood or breath test, the officer bases her opinion on the skid marks that defendant's vehicle left in the road, and the results of the field sobriety test that the officer administered to the defendant after the accident.