Whether the court of appeals followed the dictates of this court's decision in Buck v. Davis, explaining that the COA stage is not coextensive with a merits analysis?

QUESTION(S) PRESENTED ; WHETHER THE COURT OF APPEALS FOLLOWED THE DICTATES OF THIS COURT'S DECISION IN BUCK V. DAVIS, EXPLAINING THAT THE COA STAGE IS NOT COEXTENSIVE WITH A MERITS : ANALYIS? : : : WHETHER THE-COURT OF APPEALS WENT BEYOND WHAT THE COA STAGE DICTATES WHEN IT DETERMINED THAT PETITIONER'S CLAIM RELATED TO AN INCRIMINATING LETTER PRESENTED . : AT TRIAL AGAINST THE ALLEGED CO-DEFENDANT WITHOUT INSTRUCTING THE JURY IT COULD “NOT BE USED AGAINST PETITIONER, WAS UNTIMELY? ; :