There’s some killers who have film canisters in their apartments and I thought it would be really cool if you could bring one of these to a pharmacy or general store, pay a few crows and get an image that helps with the case in some way. Maybe it could even just show the image when you check a film canister in an NPC’s place. I was thinking this on a sniper case who had a ton of film, maybe it could hint to her location or even count as evidence of being in the crime scene.
The other idea might be a bit too crazy to work in the current system of the game but what if we could take video tapes and watch them similar to how we watch surveillance. This could even open up the option of having killers steal the tape of them being at a crime scene. It may be a bit of a stretch though.