|Cop Feats Galore!|
Although designed with d20 Modern in mind, the feats in Modern Basics: Good Cop, Bad Cop can easily apply to any d20 System variant you're using, be it something with Finder as part of the name or something entirely different. Happy crime-busting (or bribe-taking, depending on the nature of the campaign).
Modern Basics: Good Cop, Bad Cop is available at RPGNow and DriveThruRPG. Click on the link to your favorite site to see previews or to get your own copy.
And here's a song from Rucka-Rucka Ali that may or may not help inspire your game!