However CERA LT is capable of identifying fingerprints on casings. How can the CoA judges make a concession as they did above? What is the alternative to a retrial? JB will claim had the casings not been destoyed he would be in a position to prove his innocence. They might still exist but I believe a lot of exhibits were destroyed.
There is no concession that can be made, there is no alternative way to get evidence as there is to get mitochondrial DNA.
You keep ignoring though that her prints being on the casings would not be able to establish she loaded them into the weapon at most such would establish she touched some while on the phone. Actually loading them would have left evidence on her person and such evidences were missing. There was evidence that Jeremy attempted to plan her prints as well and it can be argued he did such.
Finding her prints on the casings would not render it possible for her to have killed herself which is what the defense needs to establish to get the conviction vacated. This is little more than a red herring in the eyes of the law. Only a few arguments would be legally significant in terms of warranting vacating the conviction: 1) undermining the evidence that proves Sheila didn't kill herself; 2) Julie changing her testimony. Nothing else anyone argues holds any legal significance at all.
The judge told the jury that they could convict if they believed Julie or if they believed the evidence that proves Sheila could not have killed herself. Undermining at least one of these is the only way to get the conviction vacated. Anything that fails to address 1 of these 2 things is simply a red herring that holds no legal significance.