Yigal Amir appealed on Thursday a ruling of a Petah Tikvah District Court saying he must remain in solitary confinement.
The district court accepted the Israeli Prison Service and State Prosecutor's opinion that Amir, who assassinated Prime Minister Yitzchak Rabin on November 4 1995, should remain in solitary confinement.
The IPS and State Prosecutor's opinion stated Amir posed a continued security risk and was at risk of being harmed by other prisoners.
Amir's attorney, Ariel Atary, told the Supreme Court there was no evidence suggesting Amir poses a danger or would be in danger, nor was there evidence substantiating IPS claims Amir may try to "spread his radical views."
Atary also argued his client is disciminated against. "He is held in solitary confinement while other prisoners – including serial killers, security prisoners, rapists and child molesters – were not."
"The gravity of Amir's offense does not measure up to that of offenses committed by Marwan Barghouti or Ronny Ron," the appeal read.
Atary told the court that if the IPS is worried about his client's radical views, they can "pair him with prisoners who are left-wing activists, who would be immune to his ideology."
The High Court has not issued a ruling.