imagine an app that is sort of like a panic button. You get pulled over, you open the app and hit the button which then (depending on your preferences), starts recording/streaming video and audio, locks the phone, and maybe starts recording accelerometer/gps data, etc.
It would need to be thoroughly developed/tested before actually it could be ethically recommended.
What do you think? Good idea? Bad idea? unfeasible? Already existing?
I will second the suggestion for a dash camera, they can record audio automatically without need for user intervention.
Another option is to just use a voice assistant, I usually quickly ask my watch to start a voice recording beforehand to ensure there is a record of the interaction.
Do any dash cams stream to the cloud or a self-hosted server? If the police spot the dashcam they may just delete the footage.
Here in America, they might also shoot the camera, you know, in self defense.