Prosecutor collaborating with PD to withhold Evidence

SO Me and my co defendant are at our pretrial conference and were going through some of the discovery, I refer to the photographic evidence that should exist of things that were seized from our residence. she stumbles upon it and both me and my co defendant view it. i tell her the significance of this photo, as it would prove that the evidence found that day, is not the same evidence that was sent to be tested. after i tell her she actually gets up with her computer immediately and goes straight to speak to the prosecutor, whos in the next room, (saw him walk in moments before) she returns and she says hes going to review it and see.

Now, a month later after recieving what she explains is all of discovery through email, among all the photos weve recieved, that picture is not among them. it has magically disappeared. we went through the photo reels several times, it should be there alongside of the others that were sent, but it simply is not. we both sent the PD a message telling them that the photo we all three looked at on that day, is missing. they again claim thats everything. Did they think we would forget i wonder? Ive no Clue, but it is almost comical how many times our rights have been circumvented around this entire process, and now this! ??

i cant afford a private attorney, neither can my co defendant, So pro se might be the way to go, i know its ill advised so save me that conjecture.

Is this not grounds for a dismissal, though hard to prove, it really shouldnt be hard to see the raquet they have going here,

What would suppose i do?