“Evidence can come in many forms. It can be testimony about what someone saw or heard or smelled. It can be an exhibit admitted into evidence. It can be someone’s opinion. Direct evidence can prove a fact by itself. For example, if a witness
testifies she saw a jet plane flying across the sky, that testimony is direct evidence that a plane flew across the sky. Some evidence proves a fact indirectly. For example, a witness testifies that he saw only the white trail that jet planes often leave. This indirect evidence is sometimes referred to as “circumstantial evidence.” In either instance, the witness’s testimony is evidence that a jet plane flew across the sky. As far as the law is concerned, it makes no difference whether evidence is direct or indirect. You may choose to believe or disbelieve either kind. Whether it is direct or indirect, you should give every piece of evidence whatever weight you think it deserves.”
[CACI Jury Instructions [citations omitted]]
