He has been accused of abuse of power, misuse of funds, failure to investigate sex crimes, improper clearance of cases, unlawful enforcement of immigration laws, and election law violations, amongst others. He has been found guilty of racial profiling in federal court, with a monitor appointed to oversee his office's operations. His jails have twice been ruled unconstitutional. The U.S. Department of Justice concluded that Arpaio oversaw the worst pattern of racial profiling in U.S. history, and subsequently filed suit against him for unlawful discriminatory police conduct