WASHINGTON - Connecticut Attorney General Richard Blumenthal is waging a court battle to get Financial Securities Assurance Inc. and its holding company to turn over 600 hours of audio recordings already released to the Securities and Exchange Commission and Justice Department that he claims contain "a rich source of evidence of potential violations" of state antitrust laws.

The case, which is pending in the Connecticut Superior Court in Hartford, reveals that the SEC and Justice have obtained audio recordings from some firms in connection with their parallel civil and criminal antitrust investigations of muni derivatives and reinvestment business, which began in 2006. Those two agencies subpoenaed dozens of firms for information going back six to 14 years.

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