n." Thus, al- though the crimes charged in counts three and six of the indictment related to Har- vey's 1980 taxes, the immunity granted in 12. See Sansorrejl United States, 380 U.S 343, 351, 85 act. 1 1010, 13 LEd.2d 882 (1965) (violation of 26 U.S.C. 17201 does not occur until the defendant commits an affirmative a