DHS Secretary Kristi Noem said the investigation is the beginning of a larger crackdown on benefits paid to undocumented immigrants.

The Department of Homeland Security is focusing on a program that provides cash assistance to certain individuals who are older, blind or disabled.

According to DHS, the subpoena requests all records from the Los Angeles County Department of Public Social Services, the agency that administers the state program, to determine if ineligible immigrants received supplemental security income from the Social Security Administration,