I just ran into the same problem. On another site (won't say where here) they list a walkthru for the original British game Operation Dorian Grey.
And from what I gather with my brother playing a game called Scratches, our main character hasn't discovered information that would lead him to take interest in a photograph of 2 people.
I simply went upstairs because anything of major importance must be near a cop guarding a door. I haven't explored downstairs yet. This might be of a hint.