Friday’s hearing came just over 36 years after the deaths of parents Jose and Kitty Menendez, in what prosecutors said was a cynical attempt by their sons to obtain a large family fortune.
After setting up alibis and trying to cover their tracks, Erik and Lyle Menendez shot Jose Menendez five times with shotguns, including in the kneecaps.
Kitty Menendez died from a shotgun blast as she tried desperately to crawl away from her killers.
The brothers initially blamed the deaths on a mafia hit, but changed their story several times in the ensuing months.
Erik Menendez, then 18, confessed to the murders in a session with his therapist.
The pair ultimately claimed they had acted in self-defence after years of emotional and sexual abuse at the hands of a tyrannical father.
During their decades in prison, changing social mores and greater awareness of sexual abuse helped elevate the men to something approaching cultural icons.
The Friday (local time) hearing, which was closed to the public, lasted 11 hours. It was held separately to the previous day’s hearing for his brother Erik Menendez, 54.
Both brothers appeared by video link from the San Diego prison where they are being held.
The panel members, whose identities were not released by the CDCR, quizzed them on their behaviour and attitude towards the murders.
The parole hearings became possible when a judge earlier this year resentenced the men, reducing their original full-life punishment to one of 50 years with the possibility of release.
– Agence France-Presse