Certainly, I can speak to that. The research that has been done on body-worn cameras is inconclusive. You'll find studies that do support its use, and others that don't, such as the one you're raising.
I would believe that ending systemic racism is not going to begin once police start using body cameras. This can be demonstrated with a number of misuses of force that have been caught on camera, and nothing has been done.
I think we need to speak more to accountability as to when there is an issue or a concern over the way that a police officer has interacted with a member of the community. How is that officer being held accountable? Simply catching this on video doesn't seem to do much. There's that evidence there, but the other issue is that the police often have the upper hand in how that evidence is used. As—