I started a new series this spring that I really like. Karin Slaughter is the author. The books I've read so far, in order:
A Faint Cold Fear
The stories center on police chief Jeffrey Tolliver and his ex-wife, pediatrician and part-time medical examiner, Sarah Linton. The books walk through murders in their town while keeping their relationship in the middle of the story. Some of the details of the murders are a bit gruesome, but those details are only a small part of the story. The majority is how they work through the investigation, which usually brings danger into their lives. The characters are well-developed and quite likeable, even while their flaws are displayed.
There is one more in this series already published, Beyond Reach. And upcoming is the latest, Fractured, due out later this summer. If you like mysteries, I recommend you pick up this series.