Amid debates on America's policing methods, Nick Berardini's debut feature "Killing them Safely" explains how two brothers revolutionized law enforcement by building the world's largest Taser manufacturer, arming and training America's police, and becoming millionaires in the process. Startling archival footage accompanies candid interviews with cardiologists, lawyers, police officers, politicians, families who lost a loved one from a deployed Taser, and a spokesperson from Taser International.