Hmmm....although the design is very strong on it's own, not sure how effective it is for a police rig in my humble opinion. The orange really throws it off for me. The only thing that makes it look like law enforcement to me is the fact it says "police". I wonder if a non-english speaker would even know this car is law enforcement, especially without any lights on top? You may have been directed to use orange, not sure...but maybe gold or silver would be worth looking at.
Also, I wonder if you might be able to have the door break in a better spot than the middle of the "L" and right next to the "F"? I always hate having letters cut by a seam.
Don't get me wrong, great work! But might be just a little too "flashy"? I would lose the black/dark blue color that fills up the bottom half of the letters for sure, doesn't add anything. In some cases, less is more. Again, just my humble $.02!