Twelve homicides, three police-involved shootings, and the furious hunt for an especially brutal killer--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. After a quiet couple of months, all hell...