Federal Rule of Evidence 804(b)(2) or a comparable State rule creates a hearsay exception in a prosecution for homicide or in a civil action or proceeding, for a statement by a declarant made when the declarant believes that his or her death is imminent, about the cause or circumstances of what the declarant believes to be his or her impending death.

United States v. Williams, 527 F.3d 1235, 1247 (11th Cir. 2008) (upholding trial court's admission into evidence of accused's history of non-compliance with federal grant regulations because accused claimed good faith defense and inadvertent mistake and rebuttal evidence was offered as "to prove...Evidence of a criminal or wrongful act apart from the act that at issue at trial Is not barred by the prohibition against circumstantial use of character if intent, knowledge, mistake, or accident is a legally-material factual issue, the opposing party suggests the non-existence of knowledge or urges mistake or accident as a defense, and evidence of another crime, wrong, or act is offered to prove the knowledge or the absence of mistake or accident by a criminal defendant or other person.

United States v. Boulware, 384 F.3d 794, 806-807 (9th Cir. 2004) (holding that the state court judgment met each of the requirements to fit the exception set forth in Rule 803(15), namely that (1) "the judgment affected an....There is a hearsay exception for a statement in a document (such as a deed) that purports to establish or affect an interest in property if the statement was relevant to the purpose of the document, unless dealings with the property since the document was made have been inconsistent with the truth of the statement or the purport of the document.

United States v. Gregg, 451 F.3d 930, 934-935 (8th Cir. 2008) (upholding trial court's exclusion of specific instances of victim's prior violent conduct to prove that the victim was the aggressor in the altercation because the victim's violent character was not an essential element of the accused's claim...Propensity, or character, is admissible if character is an essential element of a claim, charge, or defense.