Cleanup by Sean Doolittle.

In the past two weeks, most of the major news outlets had been to town.  Everybody seemed to love the story: a disgraced officer, a battered checkout girl.  Crooked cops and organized crime.  A bloodbath in the frozen heartland.  Worth assumed it must have been a slow month.
--Sean Doolittle, Cleanup (Bantam Dell, 2006).

I first heard of Sean Doolittle in an issue of Noir City, Eddie Muller's excellent e-magazine, where he was interviewed at length.  Cleanup is a good example of how crime and violence take place outside the big urban areas, fueled by crooked cops and part-time drug dealers.  It is also something of a romance, between checkout girl Gwen Mullen and screwed-up cop Matthew Worth, working class characters who are struggling to find their way in Omaha, looking for love and finding it in the wrong places, as Matthew rescues Gwen from an abusive relationship and ends up inadvertently stealing drug money.  Doolittle's writing is crisp, sometimes darkly funny and sometimes surprising and violent, with lots of detailed characters around the edges.