I have NEVER heard of an Officer trying to PROVE a suspect is innocent , ever . This is Fishing for evidence at the suspects expense . When the officer did not get the cooperation he thought he deserved from the Nurse . Well he arrested her for her Correct KNOWLEDGE OF THE LAW .  It just goes to prove many Police officers prey on the Public's ignorance of the Law and their Rights to gain evidence\convictions this is also why the Police were so swift to reconcile with the Hospital in question. This is a fine taped example of just what Laws Police are willing to break to " Get Their Collar " . Because American Citizens have Basic Rights the Police rely on a Swiss Army knife full of tricks and legal deceptions to garner evidence against suspects. This of course flies in the face of All Of Our Constitutional Rights . This particular trick by the Officer was " Trying to Prove the Suspect innocent " Any thinking person would and should be suspect of a Statement like that from Police .