It has been call the "Ferguson effect": Since the 2014 police shooting death of Michael Brown in Ferguson, Missouri, officers have been backing off of proactive policing, and criminals are becoming emboldened. Mac Donald deconstructs the central narrative of the Black Lives Matter movement: that racist cops are the greatest threat to young black males. She argues that it is criminals and gangbangers who are responsible for the high black homicide death rate and that no government agency is more dedicated to the proposition that "black lives matter" than today's data-driven, accountable police department.