However I think there is a real danger of honest mistakes being abused, and like I said most of the abuses I know about used those.
If the cameras are only under the control of the people they are supposed to be monitoring, they will wind up being used only to clear, never to convict. I don't want the police getting any access to the videos that the accused doesn't have.
Honest mistakes are already 'abused' in our legal system. Cameras add nothing to that. But they can - if the system is set up properly - reduce a whole host of other abuses.