Legal Question in Criminal Law in California

They are not going to change the DA because she does not like you. If there was a solid agreement that your case would be dismissed your PD should talk to the DA's supervisor. If that doesn't help keep going to court and eventually they will either get tired or you will go to trial. While I do not know the details, you appear to have a reasonable case at trial if your co-defendant testifies

I agree with Mr. Shapiro that you are not going to get a new D.A. Conflicts of interest are only relevant when they involve lawyers and parties on the same side of a case, not on opposite sides.

But I'm not sure I agree that you have a reasonable case if the co-defendant testifies. Possession is not the same thing as ownership. If you borrow my car then you possess it even though I still own it. You also possess the contents, and are legally responsible for possessing them if you know they are present and know what they are. So if you knew the ammo was in the car while you were borrowing the car then you did possess it, regardless of what the owner has admitted.

You might get somewhere arguing about the deal your friend made with the D.A. But I'm not sure how far it will get you. If you weren't a party to the deal then you may not be able to complain about the D.A. violating it. But the court might agree that you were a third-party beneficiary of the deal and let you try to enforce it on that basis.

You should get competent counsel ASAP. If you can't afford to hire a lawyer, the court will appoint a public defender for you.

Good luck.

You have no 'say' in the DA selection, and there is no such thing as 'conflict' with the DA. She is paid to convict you, of course she doesn't "like" you. You get a 'say' in and through your attorney if you hire one. If you can't afford to, then you get whoever the PD office appoints for you. No 'say' there either. Your attorney will have to try to enforce the deal you refer to. If not, then he gets to plead or try your case.