Grunewald v. United States

Holding a conspiracy to conceal should not be inferred from acts of concealment because "every conspiracy will inevitably be followed by actions taken to cover the conspirators' traces" and the opposite result would "extend the life of a conspiracy indefinitely"

U.S. v. Lemay

Holding that Federal Rule of Evidence 414, a companion to Rule 413 addressing the admission of propensity evidence in cases of child molestation, is constitutional on its face

U.S. v. Curtin

Holding that fictional "stories containing graphic descriptions of sexual acts with minors" were admissible to refute entrapment defense and to prove intent where defendant was the subject of an Internet sting operation in which an FBI agent posed as a minor

U.S. v. McDermott

Holding that "task of choosing among competing, permissible inferences is for the fact-finder, not for the reviewing court" evaluating challenge to sufficiency of evidence

United States v. Bailleaux

Finding prejudice mitigated by lack of Government emphasis on improperly-elicited evidence during closing argument

United States v. Evans

Holding that "the fact that the [delayed] birth certificate was an official document... provided a sufficient basis upon which a juror could conclude that the birth certificate was 'substantively genuine.' And to the extent the Government's evidence suggests otherwise, the issue boils down to the credibility of the parties' conflicting evidence, which is a question for the jury to decide."

Christmas v. City of Chicago

Finding that lay witnesses were "entitled to testify about their own perceptions, including the physical and emotional effects of the defendants' alleged conduct"

United States v. Bao

Remanding based on district court's erroneous calculation of retail value

United States v. Boyajian

Rule 403 - Excluding Relevant Evidence for Prejudice, Confusion, Waste of Time, or Other Reasons

Adopting a similar standard, but requiring the probative value to be "substantially outweighed" by these risks

Rule 404 - Character Evidence; Other Crimes, Wrongs, or Acts.

Recognizing that even uncharged similar acts can be probative of a defendant's intent and knowledge concerning charged offenses

Rule 401 - Test for Relevant Evidence

Noting that evidence is relevant if it has any tendency to make a material fact more or less probable

Rule 402 - General Admissibility of Relevant Evidence

Stating that relevant evidence is generally admissible at trial

Rule 608 - A Witness's Character for Truthfulness or Untruthfulness

Assuming it was otherwise admissible

Rule 607 - Who May Impeach a Witness

Rejecting the voucher rule