I seem to see that people here are forgetting the basic rule of carrying a gun all the time as a LEO...looking cool. Rugers, from what I've heard from a few LEO academy trainers, are by far the #1 choice for recruits to bring to their respective academies. Why? They're cheap, reliable, and combat, if not target, accurate right out of the box.
If you're a new recruit and not sure if you'll make the grade to become a cop then you'll go with a good, solid Ruger for $400 rather than making the big-bucks drop on a gucci go-faster Sig or something similar since you don't get the LEO discount yet. The Rugers work great in training but then all the other guys at your agency have all the cool guns so you sell the Ruger for almost what you paid for it and use the money to get your Glock, Sig, whatever.
This is why LEOs don't tend to use Rugers in reality...