Authorities Cited: United States Code 18 U.S.C. § 1 18 U.S.C. § 371 18 U.S.C. § 1501 18 U.S.C. § 1503 18 U.S.C. § 1506 18 U.S.C. § 1512(a) 18 U.S.C. § 1512(b)(3) Supreme Court 160 U.S. 469, 487 260 U.S. 353, 357 397 U.S. 358, 364 421 U.S. 684, 702 432 U.S. 197, 202-231 469 U.S. 70, 76 503 U.S. 249, 253-254 Circuit Courts 446 F.2d 1184 465 F.2d 147, 162 583 F.2d 1014, 1028-1029 611 F.2d 512, 520 659 F.2d 1306, 1309-1310 705 F.2d 62, 73-76 723 F.2d 1541 755 F.2d 830, 842 811 F.2d 991, 999-1000 888 F.2d 732, 744 39 F.3d 1299, 1309 57 F.3d 1012, 1016 108 F.3d 1350, 1353-1355 113 F.3d 176, 178 120 F.3d 1181, 1185 147 F.3d 1316 153 F.3d 1233, 1248-1250 183 F.3d 231, 253 217 F.3d 1084, 1098 225 F.3d 340, 348