That's interesting... I know that image #8 is of Murray, but I tried taking a picture of him in many occasions and it didn't work. Can you be more specific about it? Perhaps it's only in chapter 4? I've just finished chapter 3.
I kept trying to take pictures of Murray and
finally got him after I completed the puzzle in the bedroom and needed a light.
The police station bulletin board, which is actually called "manhunt pictures" in the game, unlocks minigame #1 - Photofit; Biba's dumpster, which you can only photograph in chapter 2 (when it's raining), unlocks minigame #2 - Letter.
However, I tried but couldn't shoot the other four objects you mention here. Do you happen to know what they unlock?
I was only able to take photos of the bulletin board before I did the photofit and the dumpster in the rain. I have both mini games. I just read somewhere about the possibility of taking the other 4 photos, I could never do it.

Oh, and I found another one:-
9. Door in room in Wales where Darren was kept. (You have to get your stuff back and go back upstairs - I took a photo of the piano then too).
Edit:I have finished the game. Have all 27 photos. The last few I got were:-
11. Mirror in secret room*
13. Gate/grill near the end of game
18. Body in bathroom
20. People in Biba's restaurant*
* I think these 2 pictures were reversed in original postings but I took picture of mirror, then checked extras and it came up as 11 (not 20). I am not sure how I got number 20. It wasn't there until I checked after I had finished the game!
I still only got 4 out of the 5 mini-games:
1. Photofit (unlocked by photo of "manhunt" board in Police Station)
2. Letter (unlocked by photo of dumpster in the rain)
3. Piano (unlocked by photo of piano)
4. ?
5. Big head mode (unlocked by photo of Bobby blowing bubbles)
What photo unlocks the 4th I wonder?
Hope this helps people who were interested.
Edit 2.I found Mini-game 4. This is unlocked by taking a photo of the music box in the secret room and is called Turning Discs.
