acy to defraud the income tax during those years. The substantive counts charge violations of the penal provisions of the Revenue Acts of 1936 and 1938, now embodied in general form in § 145 (b) of the Internal Revenue Code, 53 Stat. 63, 26 U. S. C. § 145 (b). The conspiracy count is based on the old § 5440 of the Revised Statutes, which later became § 37 of the Criminal Code, 35 Stat. 1096, 18 U. S. C. § 88.
As to foúr of the defendants, the cause was dismissed upon motion of the United States Attorney; three others were acquitted by the jury. Of the six remaining defendants, the jury brought in a verdict of guilty on all five counts against Johnson, Sommers, Hartigan, Flanagan, and Kelly, and against Brown on counts three and four, the substantive counts for the years 1938 and 1939, and on the conspiracy count. The district court imposed on Johnson a sentence of five years on each of the first four counts and of two years on the conspiracy count, as well as a fine of $10,000 on each of the five counts. The terms of imprisonment were to run concurrently and the payment of $10,000 would discharge all fines. Lesser concurrent sentences and fines were imposed on the other defendants.
The Circuit Court of Appeals reversed the judgments. Its holding undermined the entire prosecution in that it found the indictment void because it was returned by an illegally constituted grand jury. But it went beyond that major ruling. It found the four substantive counts of the indictment, in so far as they charged defendants as aiders and abettors, fatally defective. Proceeding to the merits, the court held that the case properly went to the jury against Johnson on the last four counts and that the evidence sustained the verdict against all the defendants on the conspiracy count, but that a verdict should have been directed for Johnson on the first count and for the other defendants on all but the conspiracy count. Finally, it found that the testimony of an expert accountant for the