Former President Joe Biden sued the Department of Justice late Tuesday to block the release of dozens of hours of audio connected to a now-shuttered investigation into his handling of classified documents. At issue: Seventy hours of audio recordings and transcripts dating back to 2017, which are records of conversations between the former president and Mark Zwonitzer, an author who worked with Biden on a memoir about the death of his son, Beau. The records were obtained by the Justice Department by then-Special Counsel Robert Hur, who was appointed by then-Attorney General Merrick Garland in 2023 to investigate Biden.