I've been theorizing this for some time. After I spoke with someone who is a state attorney in Florida (not Leon County) there is only one way they could do this, and I think that although the odds are slim, I think it's VERY likely.
I believe there is evidence, primarily cell phone and e-mail, that 100% incriminates the A family. There is a reason we haven't seen it yet. That is, LE/SAO could have released these docs by now (which they have, in my opinion, referenced frequently) BUT they don't have to IF they do not directly involve our two knuckleheads from Miami. A good example could be an email exchange between grandma dukes and CA:
SoFlaDentist420: "Hey Grams! The shipment of dentures and adult diapers finally made it in - you know, the ones you so badly needed. Have you processed the invoice?"
LuvzHer_Special_Snowflake_6969: "Hey booboo, OMG THANK YOU. Finally. I just processed the invoice. Plz tell Cookie Monster and Elmo to check the balance at an ATM"
In a situation like this, since our bonehead killers aren't technically identified here, this information could be withheld from discovery. I think there will be quite a big drop in the near future that will - dare I say - be quite shocking.