Bad Blood is a Virgil Flowers novel. Sandford spun Virgil off of his Lucas Davenport Prey novels. This is the fourth Virgil Flowers novel and they're all great. I recommend both series by Sandford.
This time around Virgil, an investigator for the Minnesota Bureau of Criminal Apprehension, is looking at what seems to be a pretty simple head bashing. That turns into a whole chain of murders, and eventually becomes the biggest sex crime scandal in Minnesota history. All the action you can handle and more than enough suspense. Sandford is always a great read. Very highly recommended.