All I remember at this point is that I finished the game a couple of years ago and did not experience any problems with it. It's too long ago for me to remember any details, though.
I see one part of the walkthrough that says this:
Use the flower key.
Touch the picture, take Jessie's drawing.
Place Jessie's drawings; touch the pages.
Use the frame pieces.
Trigger a mini-game.
Solution: M-I-C-H-E-L-L-E.
Take the mother's locket.
Return to the police van.
In the screenshot pictures accompanying this, there is a picture of what looks like a safe. That's all I can find.