"Rule 404(a) is a general rule of exclusion, prohibiting the introduction of character evidence to prove that a person acted in conformity with that evidence of character. State v. Bogle, 324 N.C. 190, 201, 376 S.E.2d 745, 751 (1989).
"Though this Court has not used the term de novo to describe its own review of 404(b) evidence, we have consistently engaged in a fact-based inquiry under Rule 404(b) while applying an abuse of discretion standard to the subsequent balancing of probative value and unfair prejudice under Rule 403. For the purpose of clarity, we now explicitly hold that when analyzing rulings applying Rules 404(b) and 403, we conduct distinct inquiries with different standards of review. When the trial court has made findings of fact and conclusions of law to support its 404(b) ruling . . . we look to whether the evidence supports the findings and whether the findings support the conclusions. We review de novo the legal conclusion that the evidence is, or is not, within the coverage of Rule 404(b). We then review the trial court's Rule 403 determination for abuse of discretion. State v. Beckelheimer, 366 N.C. 127, 130, 726 S.E.2d 156, 158-59 (2012).
Rule 404(b) is a "general rule of inclusion of relevant evidence of other crimes, wrongs or acts by a defendant, subject to but one exception requiring its exclusion if its only probative value is to show that the defendant has the propensity or disposition to commit an offense of the nature of the crime charged. State v. Coffey, 326 N.C. 268, 278"79, 389 S.E.2d 48, 54 (1990).
"To effectuate these important evidentiary safeguards, the rule of inclusion described in Coffey is constrained by the requirements of similarity and temporal proximity. State v. Al-Bayyinah, 356 N.C. 150, 154, 567 S.E.2d 120, 123 (2002).