From David Guyatt:Officially, Rabin's murder was a cut and dried affair. Right leaning religious zealot, Yigal Amir, was caught in the act of killing Rabin. He was arrested and later convicted. An amateur cameraman, Ronnie Kempler, later released video footage he had taken from a nearby rooftop, showing Amir shooting Rabin in the back. This film was broadcast around the world, leaving little room for doubt that Amir was guilty.
Surprisingly, however, doubts did arise - and quickly. Just a week after Rabin's death Professor Michael Hersiger, a historian at Tel Aviv University told the press "in my opinion there was a conspiracy." Hersiger went on to say he believed the conspiracy involved the Shabak, Israel's General Security Services - responsible for internal security - because of the odd connections Shabak had with Yigal Amir, the accused killer. At that time, little was publicly known about Amir except that he was deeply involved in "Eyal," a right-wing religious organisation with a political agenda. Eyal vehemently opposed the peace process, which was the centrepiece of the Rabin administration.
Then on 16 November 1995, territorial leader and later member of the Knesset - Israel's Parliament - Benny Eilon, told a press conference that Shabak "founded and funded" Eyal. He also later revealed in private that he had been warned ahead of time by former Mossad senior officer, Yitzhak Shamir, that "they" were planning to kill Rabin. Eilon didn't say who "they" were but did add that Shamir knew of the conspiracy in October 1995, two months before it happened. If that wasn't bad enough, the next evening Israeli television broadcast a report revealing that Avishai Raviv, the leader of "Eyal" was a long-term Shabak agent who operated under the codename "Champagne." Raviv, it was later learned, was an expert at promoting "fifth columnists."
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Anyone looking at Ronnie Kempler's video film taken from a rooftop across the street, can see for themselves the very odd behaviour of Rabin's bodyguards. As Rabin leaves the peace rally and heads for his car, he is closely shadowed by two Shabak bodyguards, stationed on each side and slightly behind him. The one protecting Rabin's left flank, without warning stops, turns away, and folds his hands across his stomach. He then remains immobile as Rabin, unaware of this, continues walking. This curious conduct opens a large gap on Rabin's left rear side that allows Amir, who had remained stationery until that moment, to dart around and behind Rabin and shoot him in the back. It is hard to conclude that this sequence of events was anything other than planned. At the very least, the bodyguard is guilty of gross incompetence and failed to protect his "client" at the most critical moment of his life.
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http://www.deepblacklies.co.uk/who_killed_yitzak_rabin.htm