Man Arrested For Impersonating A Cop, Gee, I Wonder Why?

From the Las vegas Sun: Metro Police arrested a man Tuesday on a count of impersonating a police officer after he allegedly conducted several vehicle stops.
Police said Bradley Wedge of Goodsprings bought a retired Nevada Highway Patrol car, a 2006 Ford Crown Victoria, and registered it with personalized license plates that read “K9UNIT.”
Officers conducted an investigation over an eight-month period and found that Wedge had conducted at least five vehicle stops, police said. http://www.lasvegassun.com/news/2011/jun/29/man-accused-impersonating-officer-conducting-traff/
There have been four or 5 cases of men impersonating police officers within the past month and pulling cars over. Gee, I wonder why this happening, but the answer can be found here:

Across from the Flamingo Dog Park/Horseman's Park at the very east end of Flamingo Rd., is a gravel parking lot that 4 times a year, has an auction. They auction off school buses, heavy equipment, Clark County cars and... police cars. Both marked and unmarked. The marked cars still have the black and white paint and are only missing the emblem, lights and siren and the vehicle number. They still have the search light attached. The unmarked cars still look look like unmarked cars and they have the side search light attached.
There have several times in the past couple months where I thought I have seen a Metro police car roaming Henderson, only to find out that it is a car that was sold at auction.
So, if Metro and Clark County continue to sell police cars still looking like police cars, there will be cases of people impersonating the police.