Thanks to everybody who posted links but I still didn't find the ones I wanted. One was of the shower stall with latent fingerprint powder all over the sides of it, dried blood pooled in the bottom. Some others just appeared to be household things, some coffee cups (apparently clean from what I could see) with a yellow number tag next to them so it must have signified something there.
The significance of Defense not turning them over to Prosecution is what is called "Discovery". In most states both sides must turn over all discovery items, reports, photos, etc that they plan to use so both sides can have a chance to review and mount their counterpoints. Again, in most states, if discovery is not turned over in a timely fashion, usually 30 days before begin of trial, the Judge can say "So sad, too bad, you didn't provide them in discovery so you can't use them." Unfortunately for the Prosecution in this case, Arizona is not one of those states. That's why Juan wants to fight it. It can be fought in Arizona but it depends on which Judge you get.