Active concealment, whether physical or verbal, is required for the elements [of misprision of a felony] to be established. See Christopher Mark Curenton, The Past, Present, and Future of 18 U.S.C. 4: An Exploration of the Federal Misprision of Felony Statute, 55 ALA. L. REV. 183, 185"86 (2003) (explaining the dichotomy between physical and verbal concealment, and noting the heightened standard for verbal concealment to include cases such as knowingly providing the police with completely false information); see also Roberts v. United States, 445 U.S. 552, 558 n.5 (1980) (requiring some affirmative act of concealment); United States v. Worcester, 190 F. Supp. 548, 565"66 (D. Mass. 1960) (summarizing federal court holdings as requiring active concealment rather than mere failure to disclose for the establishment of the crime of misprision of felony).