I know these claims were made in an episode of "the men who killed Kennedy" but beyond that has any of this ever been substantiated?
"LBJ KILLED JFK
After 50 years, the sad truth is revealed?
Unknown to the general American public and never mentioned in history books is the fact that a Texas Grand Jury has officially indicted and found Lyndon Baines Johnson guilty as a co-conspirator (from his association with Malcolm Wallace, Billie Sol Estes and Edward Clark) in the following nine (9) murders:
The killing of Henry Marshall (the Agriculture Secretary)
The killing of George Krutelnik (an FBI informant who worked for Estes)
The killing of Ike Rogers and his secretary
The killing of Harold Orr (an FBI informant who worked for Estes)
The killing of Coleman Wade (an FBI informant who wqorked for Estes)
The killing of Josefa Johnson (LBJ?s own sister!)
The killing of John Kinser (Josefa?s boyfriend)
The killing of President John Kennedy
Read the complete article here(several pages):
http://www.viewzone.com/lbj/indexx.html"