Sirhan was firing several feet directly in front of him, yet he was killed point blank from the rear, by shots fired at an upright trajectory. He had powderburns behind his ear, for God's sake.
Security guard Thane Eugene Cesar was standing at RFK's side and slightly to his rear, at the location of the shots. He admits drawing his weapon when Sirhan fired, but denies firing. He claimed to have sold a gun of the type which killed Kennedy before the shooting, but a receipt found later proved it had been sold afterwards. Cesar's politics are far right, and his security work involved partner corporations of the CIA.
In the uncropped shot of RFK on the floor with the busboy next to him, there's a clip-on tie lying on the floor by his outstretched right hand. That's Cesar's tie, which RFK evidently pulled off as he fell. One of his wounds was a contact wound on his right armpit. How could Sirhan have done that?
The only sequence of photos shot during the assassination were confiscated at the scene. After 35 years, and despite his attempts and repeated assurance that they would be returned, the photographer has not seen them. Nor has anyone else. Recently the FBI told him they had been destroyed.
Photos of the crime scene show many more bullet holes than can be accounted for by Sirhan’s gun. (The LAPD subsequently removed the wood panels and ceiling tiles and destroyed them.) Five people were shot, one twice, besides Kennedy, who himself was shot four times. To account for Sirhan hitting them all, requires several "magic" bullets with astonishing trajectories.
Bullets fired cannot be matched to each other or to Sirhan's gun, and the chain of evidence shows gross tampering.
Sirhan was found to be extremely suggestible to hypnosis, and exhibited evidence of having been hypnotized previously, with hypnotic blocks still impeding his memory of the events. There's plentiful evidence that he was in an altered state at the time of the killing, only coming out in the police station.
Sirhan's last memory before the shooting is of having coffee with a woman in a polka dot dress. He was seen in her company, with another man, entering the Ambassador hotel. Before the shooting, witnesses saw Sirhan enter the pantry in her company with another man. Immediately afterwards, a number of other witnesses saw a woman in a polka dot dress flee with a man as the woman exclaimed "We shot him! We shot Kennedy!"
Multiple witnesses saw only flashes and paper residue flying from Sirhan's gun, suggesting he was firing blanks. Witnesses who had heard many gunshots said it sounded more like a cap pistol.
Even before Sirhan was identified as a subject, hypnotist William Joseph Bryan said on air in Los Angeles that the assassin was probably mind-controlled, and later bragged to prostitutes about his work for the CIA and having hypnotized Sirhan. They thought nothing of it, because it's a matter of record that he hypnotized the Boston Strangler after his capture. But Bryan had no access to Sirhan after his capture.
Sirhan had gone missing for three months shortly before the assassination. In the mid-70s, a film cannister was discovered labeled "Sirhan Sirhan 1967." It was surveillance footage of Sirhan, apparently shot without his knowledge.
For more on RFK’s murder, I recommend William Turner's
The Assassination of Robert F Kennedy, and the recent anthology
The Assassinations. There’s much more on "the girl in the polka dot dress," including a very plausible ID (Iranian national, her father worked for the Shah’s secret police and had CIA links.) Portions of two of the books RFK essays are reproduced here:
http://www.webcom.com/~lpease/collections/assassinations/rfk.htmAlso, you may want to go here and download the hour-long "Guns and Butter" episode featuring Sirhan's current lawyer Lawrence Teeter, the only one Sirhan's had who believes his innocence.
http://la.indymedia.org/news/2003/06/64634.php