Federal authorities plans to announce their findings today in a civil rights investigation of an Arizona sheriff's office accused of using discriminatory tactics in its signature immigration patrols.
The Justice Department has been investigating Sheriff Joe Arpaio's office for alleged discrimination, unconstitutional searches and seizures, and for having an English-only policy in his jails that discriminates against people with limited English skills.
Critics say Arpaio's deputies target Hispanics during his patrols for minor traffic infractions based on their skin color so they can ask for proof of citizenship.
Arpaio has denied the allegation.
The inquiry was focused in part on 20 immigration patrols that Arpaio's office has conducted since January 2008.
During the patrols, deputies flood an area of a city to seek out traffic violators and arrest other offenders.