A national group of sheriffs that claims its authority supersedes that of the state and federal government has spread its ideology to dozens of states in recent years, in part by gaining state accreditation for its taxpayer-funded law enforcement training. But some states are pushing back. A monthslong investigation by the Arizona Center for Investigative Reporting and the Howard Center for Investigative Journalism at Arizona State University's Walter Cronkite School of Journalism and Mass Communication. Read more at azcir.org/cspoa/.