If a cop is captured alive or goes rogue undetected - as in remains as a plant in the garrison - then great. They either have a hostage they can keep around for intel or a willing accomplice on the other side of the fence. Even better if the rogue cop only agrees to help them for absurd personal compensation instead of actual camaraderie. Either way, sweet, give the rebels that insight into tac-3, no matter how brief it may be.
If the capture is noticed and rescue fails or if the rogue is found out and killed, oh well, shit happens, but you can always try again. A system like that, if that isn't already permitted by the ruleset for some bizarre reason, on the rebel side would work well I think. And no OOC protection needed for either side. Just an OOCly coordinated, cooperative effort to change how we approach the issue and the way we tell this story.