delivered the Opinion of the Court.
¶1 Earl Hector Boucher filed a petition for post-conviction relief with this Court seeking relief from a sentence imposed by the Eleventh Judicial District Court, Flathead County. In an Ordеr dated January 27, 1998, we denied two of Boucher’s claims and reserved decision on the remaining claim of ineffective assistance of counsel pending an evidentiary hearing before the District Court. Having reviewed the District Court’s findings and conclusions and the supplemental briefs filed by the parties, we now deny Boucher’s remaining claim for post-cоnviction relief.
ISSUES
¶2 1. Did the District Court err in limiting the evidentiary hearing to the issue of whether defense counsel failed to formulate a defense by not investigating the victim’s history of false aсcusations of sexual assault?
¶3 2. Did the District Court err in denying Boucher’s motion to amend the pleadings?
*298 ¶4 3. Were the findings and conclusions of the District Court regarding Boucher’s claim of ineffective assistance of counsel in error?
BACKGROUND
¶5 Upon his plea of guilty to a charge of sexual assault against his thirteen-year-old stepdaughter, the District Court sentenced Bоucher to twenty years in the Montana State Prison and designated him as dangerous for purposes of parole. Boucher subsequently filed a post-conviction petition before this Court, asserting three grounds for relief. We denied two of Boucher’s claims and ordered an evidentiary hearing before the District Court on Boucher’s remaining claim thаt he was denied effective assistance of counsel due to counsel’s failure to investigate and formulate a defense based upon the victim’s history of making false accusations of sexual assault.
¶6 During the evidentiary hearing before the District Court, Boucher attempted to introduce evidence that his guilty plea was entered as a rеsult of counsel’s ineffective assistance, not only in failing to investigate the victim’s history of false accusations, but also in failing to prepare for the trial generally and in fаiling to challenge Boucher’s confession in light of the witness’s recantation and Boucher’s assertion that his confession had been coerced. Relying on the instructions set fоrth in the order of this Court, the District Court disallowed introduction of any evidence of ineffective assistance of counsel not related to counsel’s failure to investigate the victim’s prior history. Boucher moved the District Court to amend his petition to include allegations that counsel was ineffective for the additional reasons set forth abоve, and this motion was denied. Boucher appeals the District Court’s denial of his motion to amend his petition and its findings and conclusions regarding his claim of ineffective assistance of counsel.
DISCUSSION
¶7 1. Did the District Court err in limiting the evidentiary hearing to the issue of whether defense counsel failed to formulate a defense by not investigating the victim’s history of false аccusations of sexual assault?
¶8 Boucher argues that the District Court erred in refusing his offer of evidence that trial counsel rendered ineffective assistance in not being рroperly prepared to go to trial and in failing to challenge Boucher’s confession before the District Court. We disagree.
*299 ¶9 In ordering an evidentiary hearing on Bouсher’s claim of ineffective assistance of counsel, this Court stated:
Petitioner also alleges that his attorney did not investigate the victim’s history and did not formulate a defensе. He states that an investigation would have revealed that in the past the stepdaughter had falsely accused others of similar conduct. Petitioner’s allegations of error involve the failure of counsel to act. Because they involve omissions rather than commissions, we cannot say that “the files and records of the case conclusively show that the petitioner is not entitled to relief... .” Section 36-21-201(l)(a), MCA. We thus hold that his allegations are sufficient to require an evidentiary hearing on this issue.
¶10 By its terms, our order limited thе scope of the evidentiary hearing to the question presented to us in Boucher’s petition for post-conviction relief. A trial court is not free to ignore the mandate and opinion of the reviewing court, but must proceed in conformity with the views expressed by the appellate court.
Haines Pipeline Const., Inc. v. Montana Power Co.
(1994),
¶11 2. Did the District Court err in denying Boucher’s motion to amend the рleadings?
¶ 12 Boucher argues that the District Court abused its discretion in denying his motion to amend his petition to include additional claims of ineffective assistance of counsel nоt asserted in his original pleading because the amendment would not have generated prejudice to the State. The District Court determined that because the matter wаs before it on remand from this Court, the scope of the court’s inquiry was limited to the issue specified in the order of remand regardless of whether an amendment would generate prejudice to the State. We agree with the reasoning of the District Court.
¶13 The case
sub judice
is distinguishable from those cases in which we have held that the district court has the discretion to grant or dеny a motion to amend a post-conviction petition, because of the different procedural posture of those cases. Where a post-conviction petition is filed directly before the district court, that court has original jurisdiction over the pleadings and may, in its discretion, grant or deny a motion to amend the petition.
See Bone v. State
(1997),
¶14 InHans
v. State
(1997),
¶15 We hold that the District Court did not err in concluding that it did not have authority to grant Boucher’s motion to amend pleadings on a petition over which this Court has original jurisdiction. We therefore affirm the District Court’s denial of Boucher’s motion to amend his pleading.
¶16 3. Were the findings and conclusions of thе District Court regarding Boucher’s claim of ineffective assistance of counsel in error?
¶17 Because this Court has original jurisdiction over the post-conviction petition filеd by Boucher, we do not review the District Court’s denial of Boucher’s petition for post-conviction relief; instead, we review the District Court’s findings of fact and conclusions of law regarding Boucher’s claim of ineffective assistance of counsel.
Hans,
¶18 In considering ineffective assistance of counsel claims in post-сonviction proceedings, Montana courts apply the two-pronged test set forth by the United States Supreme Court in
Strickland v. Washington
(1984),
*301
¶19 In its Findings of Fact, Conclusions of Law and Order, the District Court determined that Boucher failed to demonstrate either that trial counsel’s performance had been deficient or that, but for the alleged deficiеncies, Boucher would not have pled guilty to sexual assault. The District Court based its conclusions in part upon its determination that Boucher’s testimony at the evidentiary hearing сonflicted with his testimony under oath at the change of plea hearing and that therefore his testimony was not credible. A determination of the credibility to be afforded to evidence is exclusively within the province of the finder of fact and will not be disturbed by this Court on appeal.
State v. Flack
(1993),
¶20 Our review of the record reveals that there is substantial credible evidence to support the findings of the District Court and that those findings are not otherwise erroneous. Moreover, we hold that the District Court’s conclusions of law are not in error. For these reasons, we affirm the findings and conclusions of the District Court and hold that Boucher’s claim of ineffective assistance of counsel is without merit. Petition is dismissed.
