California does not forbid the execution of the mentally...

California does not forbid the execution of the mentally retarded but does forbid the execution of juvenile offenders. The state has life without parole. A jury decides the sentence. The Governor has the exclusive authority to grant clemency, unless the prisoner has twice been convicted of a felony. In that case, a recommendation of the State Supreme Court with four justices concurring is necessary. There have been no clemencies granted since the Furman case.