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Direct evidence supports the truth of an assertion (in criminal law, an assertion of guilt or of innocence) directly, i.e., without an intervening inference. Circumstantial evidence, by contrast, consists of a fact or set of facts which, if proven, will support the creation of an inference that the matter asserted is true.
For example: a witness who testifies that he saw the defendant shoot the victim gives direct evidence. A witness who testifies that he saw the defendant fleeing the scene of the crime, or a forensics expert who says that ballistics proves that the defendant’s gun shot the bullet that killed the victim both give circumstantial evidence from which the defendant’s guilt may be inferred.
In direct evidence, a witness relates what he or she directly experienced. (Usually the experience is by sight or hearing, though it may come through any sense, including smell, touch or pain. State v Famber, 358 Mo 288, 214 SW2d 40.)