The story was a blockbuster: A former Texas voting official was on the record detailing how nearly three decades earlier, votes were falsified to give then-congressman Lyndon B. Johnson a win that propelled the future president into the U.S. Senate. The audio recordings from Associated Press reporter James W. Mangan's interviews for the 1977 story were posted this week on the LBJ Presidential Library and Museum's archival website, Discover LBJ. After Mangan's death in 2015 at the age of 87, his family found the labeled cassette tapes at his San Antonio home and donated them last summer to the library on the campus of the University at Texas at Austin.