In his 14th appearance before a parole board in California, Sirhan Sirhan, who assassinated Sen. Robert F. Kennedy in 1968, was again denied release Wednesday.

COALINGA, Calif. — In his 14th appearance before a parole board in California, Sirhan Sirhan, who assassinated Sen. Robert F. Kennedy in 1968, was again denied release Wednesday.

Sirhan, now 66, shot Kennedy to death at the Ambassador Hotel in Los Angeles just moments after he won the California Democratic primary in June of 1968. He was wrestled to the ground in the kitchen of the landmark hotel with a gun in his hand.

The California Board of Parole has consistently denied him release because it has never been persuaded that the convicted assassin has any regrets about killing Kennedy. Typically, inmates who do win release have accepted responsibility for their crimes, are sorry for what they did, and can prove they no longer pose a danger to society.

Sirhan was originally convicted of murder and sentenced to death. His sentence was later commuted to life in prison when the death penalty was outlawed in California in 1972. It has since been reinstated.

Sirhan argued before the board that he should be granted release this time around because he was part of a conspiracy and was brainwashed, his lawyer, William Pepper, told ABC News. While he says he knows the identities of other conspirators, he is not yet prepared to name names, Pepper added.

"There is no question he was hypno-programmed," Pepper said.

They also presented evaluations from two respected psychologists who said that, if he is released, Sirhan does not present any danger to the community.

Sirhan has used the mind-control defense before, in 2003, when his previous lawyer, Lawrence Teeter, argued before the board that Sirhan was hypnotized by the Central Intelligence Agency on the night that Kennedy was shot.

Sirhan will next be considered for parole in five year's time.