Police officers should be beyond reproach. Their behaviour should be exemplary. If an officer is harassing people that's already enough reason to question whether they're fit for the job, and if there's any doubt whether they're being racist or not then it should be on the officer to demonstrate that they're not (using their record, bodycam evidence, etc). The police have had decades of unquestioning respect from the public and they've abused that privilege. Now it's time for the police to earn that respect back.