and Johnson's long-term mistress said he told her it was the Texas Oil and Gas men and the mafia (who had acted as CIA hit men for decades.) This mistress is on record saying that she met Jack Ruby in the 1950s - she was intro'd to him by one of LBJ's lawyers. Ruby was a mob informant to testified before HUAC. Nixon claimed Ruby worked for him at the time.
Ruby on camera fingering Johnson
http://video.google.com/videosearch?q=jack+ruby&sitesearch=#q=jack%20ruby%20lbj&sitesearch=One of Johnson's law firm's partner, Barr McClellan, stated Johnson's personal lawyer said Johnson was behind the assassination.
E. Howard Hunt's deathbed confession also fingered LBJ.
Sam Giancana said both LBJ and Nixon knew about the assassination before the fact. He was murdered just before he was going to testify in the reopened House Select Committee on Assassination. His murder was at leasts 6 shots in the mouth/head which is supposed to be for someone who "talks too much."
The House Select Committee on Assassination, that convened in the 1970s, concluded there was a conspiracy and that there was more than one shooter.
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As others noted here, the LA Coroner did a comprehensive autopsy on RFK and said the bullet that killed RFK was just a few inches from the back of his head and Sirhan never got that close... and he was in front. The Coroner was fired b/c of this finding.
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I don't know specifics about setting up fall guys for political hits, etc. but I do know that a hoped-for attempt to assassinate JFK in Chicago, just before Dallas, was scrubbed b/c the guy who was supposed to be the fall guy was arrested with guns in the trunk of his car. The Miami assassination attempt was also scrubbed b/c JFK learned of it via an informant and so he didn't do the same open car drive that he later did in Dallas within the next month.
I used to think all those murders in the 1960s were just coincidence but i don't anymore. I've learned about too many other assassinations our govt has organized, too much other extra-govt. CIA "wet ops," too many ties between people like Ruby, Oswald, Ferrie, Shaw, the mob... just too many coincidences to make that the "simple explanation" anymore because then you have to contort all these relationships based upon mutual right wing/criminal goals between criminals as just luck.
Don Hewitt, long-time producer of 60 Minutes, also thought the murder of JFK was a conspiracy, as did Robert NcNeil of McNeil/Lehrer report. Both were there.