What is the test for relying on circumstantial evidence in a criminal case?

"The People, of course, may rely on circumstantial evidence to connect the defendant with the commission of the crime charged and to establish beyond a reasonable doubt that he committed it.... ' "If the circumstances reasonably justify the trier of fact's findings, the opinion of the reviewing court that the circumstances might also be reasonably reconciled with a contrary finding does not warrant a reversal of the judgment." ' " (People v. Reilly (1970) 3 Cal.3d 421, 424-425.)