>body cameras got the cops arrested.

...no they didn't. A traffic camera controlled by the highway department and out of police's jurisdiction got them arrested.

Body can footage is controlled by the police. They knew they were recording themselves and I guarantee that footage was going to wind up "lost" or "corrupted". That's why they were telling an unconscious man to stop resisting as they beat him to death, because the audio implying a confrontation can exonerate them, so long as contradictory footage isn't made public.

And again: who decides footage is the cops. If they were caught on a private camera, they'd seize and wipe the footage. It was only because the footage belonged to someone they had zero authority over that they thrown under the bus so the department could cover their ass for what is clearly a regular occurence with how casual they acted about it and how they were prepared to fake audio.

They got caught over a technicality. That's it. That is the only reason we know what actually happened. You need to realize how depraved and one-sided policing is. The officers being caught wasn't the system working, it was their system breaking. Beating a man to death in a manner they clearly expected to get away with it was the system working as intended.