Whether counsel was ineffective for failing to investigate and call a witness with a potential conflict of interest who could speak to the alleged victim's history and pattern of vindictive behavior and false allegations

QUESTION(S) PRESENTED While the PCR court did not address the conflict of interest issue in it's decision, is counsel deemed ineffective for failing to investigate and call a witness, one with whc counsel has a potential conflict of interest, who could speak directly to the alleged . victim's history and paitern of vindictive behavior and false allegations toward defenda . and others?