

Probably too late. If the DA doesn’t need anything they have, they are not going to offer them anything to flip. IANAL, but as I understand it, it’s generally just the first one to flip that gets a deal. Everyone else is fucked unless they know something that the first guy to flip didn’t.
The car was moving very slowly. The cop had a choice. Get out of the way and arrest her later, or go straight to extra-judicial execution. He made the wrong choice.