The landscapes of American law, law enforcement, and criminal justice system are dramatically shifting. Not only have very public examples of brutality and injustice recently affected the relationship between communities and police forces, but changing drug laws, the ubiquity of cell phone technology, and the increasing quality of video and image manipulation are complicating everything from basic policing to courtroom procedures. Calls for social justice include not just race but mental illness, disability, and health. With roughly half of Americans believing that major changes are needed to improve policing, what might effective criminal justice reforms look like? What is the ideal relationship between the police and the community in the twenty-first century?