“ In my view, when a capital defendant's waiver of his jury trial right includes a waiver of his right to jury sentencing, this type of a searching inquiry by the trial judge into the knowing and voluntary nature of the waiver is not only sound practice but is constitutionally compelled.
The decision to waive the right to jury sentencing may deprive a capital defendant of potentially life-saving advantages. As we have recognized, the jury operates as an essential bulwark to "prevent oppression by the Government." ”

“ Some courts, believing that the Constitution does not compel an inquiry by the trial judge when a defendant purports to waive his right to a jury trial, have nevertheless recognized that "trial courts should conduct colloquies with the defendant . ”

“ Unless the jury unanimously finds beyond reasonable doubt that death is the proper sentence, the defendant must be sentenced to life imprisonment with parole eligibility after either twenty or thirty years imprisonment. See Ohio Rev.Code Ann. ”