I've learned that the best markers for fearing the police are cursing at them, spitting at them, getting in their faces, and resisting arrest. I'll bet you didn't know that. That's how people who fear a particular group of people react. It's all common sense and basic psychology.
Link: https://www.tmz.com/2021/05/04/woman-racist-tirade-latino-cop-traffic-stop-calls-him-murderer/