OPINION ON REHEARING
Petitioner filed a petition for rehearing in this Court in the above-styled cause. Petitioner primarily challenges the validity of his death sentence, and we limit our discussion to the issues we deem relevant to that issue, having found that the other assignments were properly addressed and decided in our original opinion. The Oklahoma County Public Defender’s Office has filed an amicus curiae brief, which we have used only insofar as it is relevant to the issues raised by petitioner.
I.
The first issue presented is whether petitioner’s death sentence must be vacated because one of the two statutory aggravating circumstances found by the jury was invalidated by this Court on direct appeal, even though the other aggravating circumstance was upheld. According to the United States Supreme Court, the answer depends on the function of the jury’s finding of aggravating circumstances under Oklahoma’s capital sentencing statute, and on the reasons why the aggravating circumstance at issue in this particular case was found to be invalid.
See Barclay v. Florida,
A.
We address first the function of the jury's finding of an aggravating circumstance under
Following
Zant,
however, the United States Supreme Court decided
Barclay
and
Goode.
Florida, like Oklahoma, uses aggravating circumstances to guide the discretion of the sentencer and “requires the sentencer to balance statutory aggravating circumstances against all mitigating circumstances....”
Barclay,
We find that
Barclay
and
Goode,
when read together, make clear that a state appellate court may constitutionally independently reweigh aggravating and mitigating circumstances to determine whether a death sentence must be vacated as arbitrary and capricious, in light of a finding on appeal that a particular aggravating circumstance, which was considered by the sentencer, was not supported by sufficient record evidence. We believe that this independent reweighing under such circumstances provides a rational safeguard for the constitutional requirement “that death penalty statutes be structured so as to prevent the penalty from being administered in an arbitrary and unpredictable fashion.”
California v. Brown,
— U.S. —, —,
B.
We now turn to a consideration of the reasons why the aggravating circumstance at issue in this particular case was found to be invalid. Here, we found that the medical examiner’s preliminary hearing testimony was improperly admitted during the guilt-innocence stage of the trial, because the State had failed to meet the requirement of due diligence in making a good-faith effort to obtain Dr. Dibdin’s presence at trial.
Castro v. State,
C.
Accordingly, for the foregoing reasons, we reject appellant’s claim that this Court cannot independently reweigh evidence of aggravation and mitigation in determining the validity of a death sentence, in cases where an aggravating circumstance found by the sentencer has been invalidated on appeal due to insufficient evidence. Furthermore, we reject petitioner’s argument that if this Court “has the ability to reweigh the evidence itself, then there is no reason to ever send a case to the trial court, which makes
II.
Next, we wish to address petitioner’s sixth assignment in which he argues that the application of the principles of
Stouffer
to the instant case violates the federal prohibition against
ex post facto
laws. The statutory language upon which this Court relied for its authority to conduct an independent reweighing of aggravating and mitigating circumstances on appeal, is set forth in
In
Bouie v. City of Columbia,
[A]n unforeseeable judicial enlargement of a criminal statute, applied retroactively, operates precisely like an ex post facto law, such as Art. I, § 10, of the Constitution forbids. An ex post facto law has been defined by this Court as one ‘that makes an action done before the passing of the law, and which was innocent when done, criminal; and punishes such action,’ or ‘that aggravates a crime, or makes it greater than it was, when committed.’ (citations omitted) ... If a state legislature is barred by the Ex Post Facto Clause from passing such a law, it must follow that a State Supreme Court is barred by the Due Process Clause from achieving precisely the same result by judicial construction.
Bouie,
Moreover, procedural changes in a statutory capital sentencing scheme which simply alter “the methods employed in determining whether the death penalty was to be imposed” is not
ex post facto
“[e]ven though it may work to the disadvantage of a defendant.”
Dobbert v. Florida,
Just what , alterations of procedure will be held to be of sufficient moment to transgress the [ex post facto] prohibition cannot be embraced within a formula or stated in a general proposition. The distinction is one of degree. But the constitutional provision was intended to secure substantial personal rights against arbitrary and oppressive legislation ... and not to limit the legislative control of remedies and modes of procedure which do not affect matters of substance....
Beazell v. Ohio,
The crime for which the present defendant was [charged], the punishment prescribed therefor, and the quantity or the degree of proof necessary to establish his guilt, all remained unaffected by the subsequent statute.
Dobbert,
Having examined the other assignments raised in the petition for rehearing, we have either found them without merit or have found that they were sufficiently addressed in the original opinion and do not require futher discussion. Accordingly, the petition for rehearing seeking modification of the sentence of death is DENIED.
JOHN W. CASTRO, SR., filed a petition for rehearing in Kay County Case No. CRF-83-130. DENIED.
