You also have to consider that often times, while police doing things properly looks wrong to civilians, the reverse is also true. A civilian often does things that are perfectly innocent, but look guilty to a police officer.
If looking bad on camera is evidence of wrongdoing when recorded by a police camera, why shouldn't it be for a civilian's camera?
On Forceful Conduct: The Anthony Graber Case
You also have to consider that often times, while police doing things properly looks wrong to civilians, the reverse is also true. A civilian often does things that are perfectly innocent, but look guilty to a police officer.
If looking bad on camera is evidence of wrongdoing when recorded by a police camera, why shouldn't it be for a civilian's camera?