Book excerpt: "February 2013 was a good month for murder in suburban Washington, D.C. After gaining unparalleled access to the homicide unit in Prince George's County, which borders the nation's capital, Del Quentin Wilber begins shadowing the talented, often quirky detectives who get the call when a body falls... And then, after a quiet couple of months, all hell breaks loose: suddenly every detective in the squad is working day and night to solve one shooting and stabbing after another. In particular, the entire unit becomes obsessed with a "red ball," a high-profile case involving a 17-year-old honor student attacked by a gunman who kicked down the door to her house and murdered her in her bed."--