Parties do not have an unlimited right to agree to modifications of the rules of evidence that apply in trials to which they are or may become parties.

United States v. Hewitt, 634 F.2d 277, 278 (5th Cir. 1981) (conviction for three counts of unlawful possession or receipt of firearms; court reversed and remanded for a new trial, after finding that accused was erroneously denied the opportunity to present evidence of his general character as a...A criminal defendant may offer a pertinent trait of his or her character circumstantially -- to show the defendant's doing or non-doing of a specific act.

United States v. Guidry, 456 F.3d 493, 500-501 (5th Cir. 2006) (upholding trial court's admission of accused's other sexual assaults because, even though accused had not been convicted for the said offenses, Rule 413 does not limit admissibility of evidence of the act of doing or perpetrating other sexual...Federal Rule of Evidence 413(d) provides that for purposes of Rule 413 and also for purposes of Federal Rule of Evidence 415 an "offense of sexual assault" is a crime under Federal law or the law of a State (as defined in section 513 of title 18, United States Code) that involved-- (1) any conduct proscribed by chapter 109A of title 18, United States Code; (2) contact, without consent, between any part of the defendant's body or an object and the genitals or anus of another person; (3) contact, without consent, between the genitals or anus of the defendant and any part of another person's body; (4) deriving sexual pleasure or gratification from the infliction of death, bodily injury, or physical pain on another person; or (5) an attempt or conspiracy to engage in conduct described in paragraphs (1)-(4).

Rosenberg v. United States, 120 F. 935, 937 (10th Cir. 1941).Inferences on inferences are impermissible