Extrajudicial "justice" came into its own in this country with the posse comitatus, the slave patrol, and the Fugitive Slave Laws of the 19th century. It continued into the 20th with the lynch mob, the Vigilance Committee, the Citizens' Council and the Klan. And it lives on today in the citizens' patrol, the Minuteman militia, the Patriot movement -- and your local precinct. For white-on-black violence has historically found willing perpetrators in police departments like Sanford, Florida's, as much as in private "neighborhood watches" like Zimmerman's.