The legal action by the Department of Homeland Security centers around California's Cash Assistance Program for Immigrants.

The U.S. Department of Homeland Security announced Monday it issued a subpoena to the Los Angeles County Department of Public Social Services as part of a probe into the state's Cash Assistance Program for Immigrants to determine if people in the country illegally have been receiving benefits for which they are ineligible.

The Department of Homeland Security launched an investigation into California’s Cash Assistance Program for Immigrants due to concerns it may have unlawfully distributed Social Security payments to illegal immigrants.