The Justice Department on Wednesday made its first individual arrest in its fraud case against the Southern Poverty Law Center, charging former Intelligence Project Director Heidi Beirich with helping to conceal donor-funded payments to informants embedded in white supremacist groups.

Beirich was arrested Wednesday in California, according to a person familiar with the arrest. The 26-page second superseding indictment was filed in the U.S. District Court for the Middle District of Alabama, where the broader case against the SPLC is pending.