Where would photographic evidence taken at crime scene in Northern KY be developed and stored?

Photographs were taken of several skeletal remains of dead horses by a State Trooper on the day of the arrest. The county attorney has publicly denied that there were no dead horse remains found at the property, despite the fact that he has shown them to two people. The owners were charged with 8 counts of cruelty to animals, and county is in the process of doing a plea bargain and allowing them to keep 11 horses still on their property, who are still in a state of neglect, and 4 horses died after the investigation was started. I am afraid that this evidence may be suppressed and may somehow disappear into the 'system'.