What is the test for establishing a “net worth” for income tax purposes?

The leading case in the United States is Holland v. United States, supra. Clarke J. noted that although net worth assessments could be used for income tax purposes the limitations of the methodology must be carefully considered so as to maintain the onus of proof on the prosecution. Let me refer to some of the comments of Clarke J. which are applicable to the case at bar: “¶23 In a typical net worth prosecution, the Government, having concluded that the taxpayer's records are inadequate as a basis for determining income tax liability, attempts to establish an "opening net worth" or total net value of the taxpayer's assets at the beginning of a given year. It then proves increases in the taxpayer's net worth for each succeeding year during the period under examination and calculates the difference between the adjusted net values of the taxpayer's assets at the beginning and end of each of the years involved. The taxpayer's nondeductible expenditures, including living expenses, are added to these increases, and if the resulting figure for any year is substantially greater than the taxable income reported by the taxpayer for that year, the Government claims the excess represents unreported taxable income. In addition, it asks the jury to infer willfulness from this understatement, when taken in connection with direct evidence of "conduct, the likely effect of which would be to mislead or to conceal.” ... ¶24 Before proceeding with a discussion of these cases, we believe it important to outline the general problems implicit in this type of litigation. In this consideration we assume, as we must in view of its widespread use, that the Government deems the net worth method useful in the enforcement of the criminal sanctions of our income tax laws. Nevertheless, careful study indicates that it is so fraught with danger for the innocent that the courts must closely scrutinize its use. ¶25 One basic assumption in establishing guilt by this method is that most assets derive from a taxable source, and that when this is not true the taxpayer is in a position to explain the discrepancy. The application of such an assumption raises serious legal problems in the administration of the criminal law. Unlike civil actions for the recovery of deficiencies, where the determinations of the Commissioner have prima facie validity, the prosecution must always prove the criminal charge beyond a reasonable doubt. This has led many of our courts to be disturbed by the use of the net worth method, particularly in its scope and the latitude which it allows prosecutors... ¶34 While we cannot say that these pitfalls inherent in the net worth method foreclose its use, they do require the exercise of great care and restraint. The complexity of the problem is such that it cannot be met merely by the application of general rules... Trial courts should approach these cases in the full realization that the taxpayer may be ensnared in a system which, though difficult for the prosecution to utilize, is equally hard for the defendant to refute. Charges should be especially clear, including, in addition to the formal instructions, a summary of the nature of the net worth method, the assumptions on which it rests, and the inferences available both for and against the accused. Appellate courts should review the cases, bearing constantly in mind the difficulties that arise when circumstantial evidence as to guilt is the chief weapon of a method that is itself only an approximation... ¶40 Establishing a Definite Opening Net Worth. ¶41 We agree with petitioners that an essential condition in cases of this type is the establishment, with reasonable certainty, of an opening net worth, to serve as a starting point from which to calculate future increases in the taxpayer's assets. The importance of accuracy in this figure is immediately apparent, as the correctness of the result depends entirely upon the inclusion in this sum of all assets on hand at the outset... ¶43 The Government's Investigation of Leads. ¶44 ...When the Government fails to show an investigation into the validity of such leads, the trial judge may consider them as true and the Government's case insufficient to go to the jury. This should aid in forestalling unjust prosecutions, and have the practical advantage of eliminating the dilemma, especially serious in this type of case, of the accused's being forced by the risk of an adverse verdict to come forward to substantiate leads which he had previously furnished the Government. It is a procedure entirely consistent with the position long espoused by the Government, that its duty is not to convict but to see that justice is done... ¶46 Net Worth Increases Must be Attributable to Taxable Income. ¶49 ...Increases in net worth, standing alone, cannot be assumed to be attributable to currently taxable income. But proof of a likely source, from which the jury could reasonably find that the net worth increases sprang, is sufficient. ...here the disclosed business of the petitioners was proven to be capable of producing much more income than was reported and in a quantity sufficient to account for the net worth increases.”