What I can tell you is that an officers job is a lot of travel between calls. During those calls I got to hang out and just take pictures. I did some in HDR and others were just straight night shooting. What you see here is the end result of the purposefully shot for HDR.
I shot these with a wide angle lens, somewhere around 20mm on the EOS20d. I bracketed and shot them +/- 2 stops and used Photomatix for the HDR file generation. The images were then post processed in Virtual Photographer.
The straight up night scene had to have quite a bit of color correction done to get it closer to reality. Damn mercury vapor lights are so orange it really skews things to far out of line. I balanced to keep it on the warm side and did dial in some contrast to get better dark in the shadows. I went for the lonely look without the total despair of letting the tones go very blue and cold.