A fear of rampant sex-trafficking in American cities sparked a new wave of civilian vigilante activity in the early twenty-first century. 

The surprising story of the vigilantes who took it upon themselves to catch bank robbers in the 1920s and 30s.

Illegal violence has always been a political tool, often serving the interests of the powerful. A historian looks at the case of 1930s Birmingham, Alabama.

Over the course of the nineteenth century policing became increasingly professionalized.