Multiple federal statutes can criminalize obstructing or interfering with federal law enforcement; key statutes and typical penalties include: (1) 18 U.S.C. §111 — assaulting/resisting/impeding federal officers: misdemeanor (up to 1 year) for simple assault, felony tiers up to 8 years where physical contact or intent to commit another felony, and up to 20 years if a deadly weapon is used or bodily injury inflicted; (2) 18 U.S.C. §372 — conspiracy to impede or injure an officer: up to 6 years; (3) 18 U.S.C. §1505 — obstructing proceedings before federal departments/agencies: up to 5 years (8 years if terrorism-related); (4) 18 U.S.C. §1512 — witness/victim/informant tampering and obstruction of official proceedings: penalties vary up to 20–30 years depending on conduct. Prosecutors also use related obstruction, conspiracy, and civil-disorder statutes depending on facts.