A police officer in Tucson, Arizona, filed a lawsuit against the state's governor Thursday over a controversial new immigration law.
Officer Martin H. Escobar says in the lawsuit that there are no "race-neutral criteria or basis to suspect or identify who is lawfully in the United States."
The law allows police to ask anyone for proof of legal U.S. residency. Arizona Gov. Jan Brewer and others who support the law say it does not involve racial profiling or any other illegal acts.