A person's other crimes, wrongs, or acts are not barred by the character rule either if they are not offered to show that person's propensity or if they are not offered to show that that person engaged in conduct on a particular occasion because of his or her propensity to engage in that sort of conduct.

See United States v. Silva, 380 F.3d 1018, 1020 (7th Cir. 2004) (reversing conviction for conspiracy and possession with intent to distribute methamphetamine because the trial court erroneously allowed the testimony, at....If a declarant is unavailable to testify at the time of trial, a criminal defendant's federal constitutional right to confront, cross-examine, and impeach an adverse witness is satisfied if the defendant had an adequate opportunity in a prior proceeding to confront, cross-examine, and impeach the unavailable declarant.

Crawford v. Washington, 541 U.S. 36, 51 (2004) ("Statements taken by police officers in the course of interrogations are also testimonial under even a narrow standard.").A statement made by a criminal defendant during custodial interrogation by law enforcement officials is normally considered "testimonial" and the use of such a statement by a defendant in the defendant's criminal trial to prove the truth of the matter asserted by the defendant is therefore subject to the constraints imposed by the right of confrontation guaranteed to defendants in state and federal trials by the Sixth Amendment to the U.S. Constitution.

United States v. Jordan, 509 F.3d 191, 202-203 (4th Cir. 2007) (upholding trial court's admission of witness Brown's statements to her friend Adams as statements against penal interest because Brown's statements which....A statement qualifies as a statement against interest for purposes of the hearsay exception for statements against interest only if the statement, at the time the declarant made it, was so contrary to the declarant's interest that a reasonable person in the declarant's position would not have made if the declarant had believed the statement to be untrue.