The ROC former President's scandal refocuses us on whether public officers are obliged to explain how to enrich themselves. Although requiring public officers to explain resources of their property might result in the question against the presumption of irmocence, it deserves further discussions whether requiring public officers to explain resources of their property is constitutional. This paper briefly introduces components and constitutional limits of a statute crime which is enacted by Congress. Since the presumption of innocence is derived from the right to fair trial, making public officers criminals for unknown resources of property is supposed constitutional.