If a defamatory statement impugns a person's character and if truth is a defense, character may be admissible to show that the otherwise defamatory statements is true.

Tompkins v. Cyr, 202 F.3d 770, 779 (5th Cir. 2000) (upholding trial court's admission of the testimony by Mrs. and Dr. Tompkins about the anonymous threats because "neither the testimony as to the threats, the....If some human utterance has legal significance under applicable substantive law and the utterance is offered to establish that a verbal act having such legal significance has taken place, the utterance is not hearsay under Federal Rule of Evidence 801(c) or a "statement" for purposes of Federal Rule of Evidence 801(a)(2) even if the utterance also contains an assertion or appears to contain an an assertion.

Camfield v. City of Oklahoma City, 248 F.3d 1214, 1232 (10th Cir. 2001) (upholding trial court's exclusion of witnesses' testimony about Sgt. High's seizure announcement of child pornography videos upon walking into a video rental store where the conduct was not a semi-automatic act and could not serve as...Habit is a regular response to a specific situation.

Fed. R. Evid. 608(a) ("The credibility of a witness may be attacked or supported by evidence in the form of opinion or reputation, but subject to these limitations: (1) the....Reputation or opinion is admissible to impeach a witness by showing the untruthfulness of the witness.