Miss. R. Crim. P. 12.2
Comment
Rule 12.2 includes standards provided in former Rules 9.06 and 9.07 of the Uniform Rules of Circuit and County Court. The determination of the defendant's mental competency should be made at the earliest practicable date. The United States Supreme Court has held that the failure to make a determination of competency when there are reasonable grounds to doubt such is fundamental constitutional error. See Drope v. Missouri, 420 U.S. 162, 95 S. Ct. 896, 43 L. Ed. 2d 103 (1975); Pate v. Robinson, 383 U.S. 375, 86 S. Ct. 836, 15 L. Ed. 2d 815 (1966). See also House v. State, 754 So. 2d 1147, 1152 (Miss. 1999).
Sections (a) and (b) make clear that the determination of the defendant's competency to stand trial is separate and distinct from the determination of the defendant's sanity at the time of the offense. An examination to investigate competency may be combined with an examination to investigate the defendant's sanity at the time of the offense, provided that the judicial order makes a clear distinction between the two purposes for evaluation to ensure that the correct legal criteria are applied. While the test for competency is distinct, as a matter of law, from the test for sanity at the time of the offense, the reports prepared may contain information having a substantial bearing on both issues.
Section (c) extends this process to cases in which there are reasonable grounds to believe the defendant's intellectual disability precludes the imposition of a death sentence. See Chase v. State, 873 So. 2d 1013, 1027 (Miss. 2004) (citing Atkins v. Virginia, 536 U.S. 304, 122 S. Ct. 2242, 153 L. Ed. 2d 335 (2002)).