The Southern Poverty Law Center's former chief financial officer was arrested Wednesday and charged with fraud in a superseding indictment that accuses her of overseeing donor payments to informants inside hate groups -- including one with whom she had been in a romantic relationship and shared a bank account -- according to newly unsealed court documents.Heidi Beirich was arrested in California Wednesday morning and charged with several counts, including conspiracy to commit wire fraud and money laundering. Popular ReadsThis is a developing story. Please check back for updates.