On October 5, 2013, Governor Brown signed AB 4, the TRUST Act, which went into effect January 1, 2014. It will be codified as Gov. Code §§ 7282, 7282.5. The TRUST Act prevents local law enforcement from detaining noncitizens pursuant to an immigration “hold” or detainer beyond the time that they otherwise could be released from criminal custody. This Guide discusses how the TRUST Act works and defense strategies in light of the Act.