The scenario you are describing closely resembles a scene from the 2018 film "The Hate U Give," which addresses themes of racial injustice and police violence. In the film, a young black woman witnesses the police shooting of her friend after a traffic stop goes wrong. While some details may not match perfectly, the film captures the emotional and societal tensions surrounding race and policing.
If this is not the specific movie or episode you are referring to, please provide more context or details, and I will do my best to help you identify it.