A Tucson police officer has filed a federal lawsuit challenging Arizona's new immigration law, claiming the legislation will hinder police investigations in Hispanic-prevalent areas. The suit, filed Thursday in U.S. District Court in Tucson by Officer Martin H. Escobar, also claims SB 1070 would make police focus more on immigration than helping people in need. "What are we saying to the undocumented who are victims of crimes, what are we saying to the undocumented who are critical witnesses to crimes?" said Escobar's attorney, Richard Martinez. The suit also claims the new law, which Gov. Jan Brewer signed on April 23, violates several constitutional rights and also violates federal law because the Tucson Police Department and the city have no authority to perform immigration duties. Escobar, 45, a 15-year veteran of TPD, noted in the lawsuit his experience patrolling the Hispanic-heavy Operations Division South indicates there's no racially neutral criteria that can be used by officers to determine whether a person is in the country illegally. "Hey, there's a lot of people lawfully who speak Spanish; there's a lot of people who speak with an accent," Martinez said. "Those tell you that they're Latino or Hispanic or Mexican, but they don't tell you anything about their document status." Tucson cop first to sue to block AZ immigration law Why does it not surprise me? Probably because he is naturalized american citizen = one foot in his country of birth; the other one here.