I gather it to mean that it was dismissed due to the fact that once the police took over, she was in custody and they failed to Miranda warn her. It was at the point that they took her ID that she was in custody and it has nothing to do with the taking of the ID. She then made statements and they were supressed. THe question of how the weed got in the bag could not be countered without her statements and it was a misdemeanor anyway so they let it go.