[2] A legal challenge by the federal government was unsuccessful in the Ninth Circuit Court of Appeals.

[10] An online poll conducted by UC Berkeley in April 2018 found that 56% of voters support the law and 41% oppose it.

[15] Governor Brown has denied that Singh's murder by an illegal immigrant had anything to do with California's new sanctuary law.

[16] Also in December 2018, an undocumented immigrant who had twice been deported, but who had returned to the United States illegally, was arrested on a misdemeanor charge but released under the new sanctuary law, and then embarked on a 24-hour shooting spree in Tulare County, killing two and injuring seven, before crashing his car and dying.

"[17][18] Several cities and local governments in California declared their opposition to the state's sanctuary policies and passed ordinances to that effect.