Heidi Beirich made an initial appearance in federal court, according to her defense attorney Michael Proctor. CNN reported that she had been arrested earlier Wednesday.

A 26-page superseding indictment naming Beirich, who was first unmasked by The Post in June, was later filed in the Middle District of Alabama.

“There is a new indictment that includes the former CFO of SPLC,” Attorney General Todd Blanche confirmed at an unrelated news conference at DOJ headquarters, adding that there had been “an arrest made,” though Beirich’s attorney said she appeared voluntarily in court.

Beirich was one of several SPLC leaders accused of opening up bank accounts with fake company names to funnel payments toward various hate group leaders.

Her identification came from details in an indictment brought against the left-wing group out of the Northern District of Alabama.

That filing accused Beirich of helping to funnel $1.2 million in SPLC donor money to an informant in the white supremacist group National Alliance — who was also purportedly her lover.

The June 2 indictment had named the “person who would become Director of the SPLC’s Intelligence Project” as “Employee-2.” Beirich served in that role from 2012 to 2019.