Did the Ninth Circuit violate the defendant-appellant's due process right of access to the court in denying his pro se supplemental brief?

QUESTION PRESENTED In a first appeal of right, did the U.S. Court of Appeals for the | Ninth Circuit (“Ninth Circuit”) violate defendant-appellant Ronald Boyajian’s (“Petitioner”) Due Process right of access to the court in denying Petitioner's filing a pro se supplemental brief raising issues and arguments not raised by appointed counsel? |