Circumstantial evidence is a fact that can be used to infer another fact.
E.g., If a man accused of embezzling money from his company had made several big-ticket purchases in cash around the time of the alleged embezzlement, that would be circumstantial evidence that he had stolen the money. The law makes no distinction between the weight given to either direct or circumstantial evidence. E.g., X is suing his wife, Y, for a divorce, claiming she is having an affair with Z. Z's fingerprints are found on a book in X and Y's bedroom. A judge or jury may infer that Z was in the bedroom. The fingerprints are circumstantial evidence of Z's presence in the bedroom.