not apply Ohio law correctly. And such a claim is not justiciable in federal habeas proceedings. As the Supreme Court said in Estelle v. McGuire, 502 U.S. 62, 112 S.Ct. 475, 116 L.Ed.2d 385 (1991):
“[W]e reemphasize that it is not the province of a federal habeas court to reexamine state-court determinations on state-law questions. In conducting ha-beas review, a federal court is limited to deciding whether a conviction violated the Constitution, laws, or treaties of the United States.” Id. at 67—68, 112 S.Ct. 475.
C. Whether the trial court improperly double-counted aggravating circumstances and weighed them collectively against the mitigating factors.
Mr. Cooey argues (p. 28) that the trial court improperly combined the aggravating circumstances related to both murders. He points out that the Ohio Supreme Court found error here, agreeing that “when a capital defendant is convicted of more than one count of aggravated murder, the penalty for each individual count must be assessed separately.” State v. Cooey, 46 Ohio St.3d 20, 544 N.E.2d 895, 916 (1989). He fails to point out, however, that the Ohio Supreme Court concluded that “the aggravating circumstances of each murder, weighed separately, outweigh the mitigating factors,” and that “although the trial court erred, its error was not plain error, and therefore not reversible error in light of Cooey’s failure to raise it in the court of appeals.” Id. at 917. This claim was thus procedurally barred, as the federal district court held, unless Mr. Cooey can demonstrate cause and prejudice under Wainmight. Cooey v. Anderson, 988 F.Supp. at 1093—94.
Mr. Cooey also asserts (p. 28) that this is an “error of federal constitutional dimension.” The case he cites for that point, however (Woodson v. North Carolina, 428 U.S. 280, 304, 96 S.Ct. 2978, 49 L.Ed.2d 944 (1976)), is inapposite — it had nothing to do with the improper aggregation of aggravating circumstances, but rather struck down a mandatory death penalty statute (thus the Court’s language that Mr. Cooey quotes on p. 29 about considering the individual circumstances of each crime). Mr. Cooey has therefore not made a substantial showing of a constitutional violation with respect to this claim, especially considering that the Ohio Supreme Court held that the result would have been the same even without any improper double-counting.
D. Whether the trial court prejudicially erred in failing to merge two duplicative aggravating circumstances
Mr. Cooey (p. 29 — 30) points to two aggravating circumstances that are dupli-cative, and should therefore have been merged:
• Ohio Rev.Code § 2929.04(A)(3): “The offense was committed for the purpose of escaping detection, apprehension, trial, or punishment for another offense committed by the offender;”
• Section 2929.04(A)(7): “The offense was committed while the offender was committing, attempting to commit, or fleeing immediately after committing or attempting to commit [the felony], and either the offender was the principal offender ... or, if not the principal offender, committed the aggravated murder with prior calculation and design.”
Because these aggravating circumstances are similar, they should not both have been used against Mr. Cooey. The Ohio Supreme Court agreed, saying that the “specifications for which Cooey was trying to escape accountability [Section 2929.04(A)(3) ]... are the same as those that support his convictions of the felony murder specifications [Section 2929.04(A)(7) ].” State v. Cooey, 544 N.E.2d at 917. However, the Ohio Supreme Court