A criminal conviction may rest solely on circumstantial evidence.

Fed. R. Evid. 104(b) advisory committee's note ("If preliminary questions of conditional relevancy were determined solely by the judge, as provided in subdivision (a), the functioning of the jury as a trier of fact would be greatly restricted and in some cases virtually destroyed. These are appropriate questions for juries. Accepted...The evidence for a condition upon which the relevance of evidence depends must be sufficient to support a finding by the trier of fact that the condition exists.

Fed. R. Evid. 1004(3) ("The original is not required, and other evidence of the contents of a writing, recording, or photograph is admissible if-- ... (3) Original in possession of opponent. At a time when an original was under the control of the party against whom offered, that party was put on notice, by the pleadings or otherwise, that...The best evidence rule is inapplicable -- the original writing or the original of another thing to which the rule applies -- need not be used to prove the contents of the writing or such other thing if the original is in the opponent's possession when evidence other than the original is offered to show the co9ntents of the original and adequate notice was given to the opponent that the contents of the writing or other things would be the subject of proof at trial and the opponent does not produce the original at the trial of hearing.

Schafer v. Time, Inc., 142 F.3d 1361, 1371-1372 (11th Cir. 1998) (reversing jury verdict and remading for new trial in diversity action even though the trial court had properly made a preliminary ruling which allowed defendant magazine publisher to introduce and explore plaintiff libel victim's specific...Propensity, or character, is admissible if character is an essential element of a claim, charge, or defense.