If any of the innuendos had any credible evidence to support them, an appeal to higher courts for a new trial would have been made by now. The original defense lawyers were right. An argument for a conspiracy wouldn’t have helped Sirhan.
Again, a new trial based on the conspiratorial evidence that has surfaced since Sirhan's 1969 trial was denied in 2012:
"Sirhan, the sole person convicted of killing Kennedy, is seeking a new trial or freedom from his life sentence based on “formidable evidence” asserting his innocence and “horrendous violations” of his rights, defense attorneys said in federal court papers filed last year.
Harris, who is asking a federal court in Los Angeles to dismiss Sirhan’s request, conceded in court papers filed Wednesday that his lawyers may be able to show two guns were involved in Kennedy’s assassination. Kennedy was seeking the Democratic presidential nomination when he was killed.
But even if Sirhan’s lawyers can show 13 shots were fired in the Kennedy shooting, Sirhan shouldn’t be released from prison, Harris said.
“The mere possibility that more than one firearm was discharged during the assassination does not dismantle the prosecution’s case” against Sirhan, the attorney general said in the latest court documents.
Harris said Sirhan is relying on acoustic expert Philip Van Praag’s analysis of a tape recording of the Kennedy shooting that concludes 13 shots were fired during the murder and “demonstrates the existence of a second shooter because (Sirhan) only fired eight shots.”
The attorney general argues that even if there were a second gunman involved in the Kennedy shooting, Sirhan hasn’t proven his innocence."https://www.cnn.com/2012/02/04/justice/california-sirhan-rfk/index.htmlSo Kamala Harris pretty much agreed with Sirhan's original lawyers who in 1969 concluded that the conspiracy evidence wouldn't have gotten him off the hook legally.
There's no way to prove that Sirhan was under hypnosis at the time of RFK's assassination so that theory doesn't help at all. The second-shooter argument is very plausible but not enough to exonerate Sirhan.
Since the last attempt at a new trial, his lawyers have focused their efforts on Parole.