One thing I really feel I can applaud is your attention to these minor details, broken window, text on the different screens and so forth. The lack of detail in the general background could probably be attributed to the rain, I assume that's what it is. Would be nice to see something like puddles, as it's obviously raining in through the broken window, or something like that.
Your shading is really well done, and I like the color scheme you went for. I would like to see this a bit more refined, if you know what I mean? It's pretty obvious where the brushes or colors have been changed, and a bit more of a gradient coloring would be nice, slowly going from shadow to light and such.
Also, is that a gun leaning on the wall behind her, or just a part of the building?