A trial attorney's ignorance of a claim, inadvertence, or tactical decision to withhold a claim may not constitute good cause, nor may a claim of ineffective assistance of prior postconviction counsel constitute good cause.
A defendant raising a claim of newly discovered evidence of factual innocence or ineligibility for the death penalty, otherwise barred by the provisions of subsection (a) of this section or G.S. 15A-1415(c), may only show a fundamental miscarriage of justice by proving by clear and convincing evidence that, in light of the new evidence, if credible, no reasonable juror would have found the defendant guilty beyond a reasonable doubt or eligible for the death penalty.
N.C. Gen. Stat. § 15A-1419