NIJC filed a lawsuit against against Maricopa County Sheriff Joe Arpaio challenging Maricopa County’s policy of honoring immigration detainers--meaning the local police holds individuals until immigration authorities can pick them up--without a warrant. The new Maricopa County Sheriff Paul Penzone later announced they will no longer honor detainers, citing a “threat of litigation.”

The Arizona Republic: Lawsuit challenges Maricopa County sheriff's new ICE handoff of people flagged with immigration 'detainers' (3/8/2017)

The Arizona Republic: ICE calls Sheriff Paul Penzone's new Maricopa County jail policy a 'dangerous change,' but judges across U.S are ruling against immigration detainers (2/18/2017)

The Arizona Republic: New lawsuit against Sheriff Joe Arpaio challenges immigration holds in jails (12/15/2016)