So far the lighting seems pretty dark overall, not just on the note. If I were you, I would try to boost it a bit so you get that nice contrast - light and dark.
Modeling looks great, textures are nice, though the wood bump texture for the table is a little noisy. You might try running that through Photoshop’s Despeckle or some equivalent GIMP filter.
The broken glass looks great. That pistol though - I used to have a pellet gun just like it when I was a kid. That think was so under powered that it would barely shoot through a soda can. I found a picture of it:
If you modeled it, nice job! You may want to consider either finding a model for a higher caliber over at Blendswap, or making one yourself. I realize that most people would have no idea that that pistol is actually a pellet gun, but for me, it kinda takes away from the plausibility of the scene.
Keep up the good work!