In 1984, Billie Sol Estes told a grand jury investigating the 1961 shooting death of Henry Marshall, an official with the Department of Agriculture, that Wallace was his murderer. Estes, a long-time conman who served two prison terms for his crimes, said that Marshall possessed information linking Estes's fraudulent schemes to a heavily funded political slush fund run by Lyndon B. Johnson.[2][18] According to Estes, he and Johnson discussed the need to stop Marshall from making their illegal ties public.[2] In exchange for immunity from prosecution, Estes was also prepared to provide the United States Department of Justice information of eight killings orchestrated by Johnson, including the assassination of John F. Kennedy.[18] He claimed that Wallace persuaded Jack Ruby to recruit Lee Harvey Oswald and that Wallace fired a shot that struck Kennedy.