It's just speculation, when it comes down to it. I would think the police had to have had the photos at first, but it's possible it was then agreed that they should be stored more securely.
The only semi-connection I saw to this outside BG was Barbara having the camera in BOP Origins and Omens. She says that Bruce didn't want to give it to her. But that's all that was mentioned of it.
Uhg, yeah, not really a fan of that Origins and Omens bit, nor the ending of BoP.