Newly unsealed court documents say one of California state Sen. Ron Calderon's own aides and a former member of the state Assembly staff assisted the FBI in the corruption sting that ensnared the politician.
The papers gave new details of the FBI's six-year investigation of Calderon and his brother, Tom, a former assemblyman. Both men face trial in September on corruption charges.
The documents refer to FBI informants known by the pseudonyms "Steve" and "Sam" who met regularly with investigators and shared texts and emails from Calderon.
Steve was described as holding a high-level position on Ron Calderon's staff and Sam as previously holding a high level advisory position in the California Assembly.
Ron Calderon is charged in a 24-count federal indictment with accepting $100,000 in bribes, among other charges.