Assaulting a Federal Officer / 18 U.S.C. Sec. 111 is a federal offense that occurs when someone uses physical force or a deadly or dangerous weapon to threaten, intimidate, or interfere with a federal officer while they are performing their official duties. This offense has two types: felony and misdemeanor. Felony Assaulting a Federal Officer / 18 U.S.C. Sec. 111 carries a maximum penalty of up to 8 years in prison and a fine of up to $250,000. To be convicted of this offense, the defendant must have intended to harm the federal officer, have acted knowingly, and have used physical force or a deadly or dangerous weapon. Misdemeanor Assaulting a Federal Officer / 18 U.S.C. Sec. 111 carries a maximum penalty of up to 6 months in prison and a fine of up to $5,000. To be convicted of this offense, the defendant must have acted knowingly and have used physical force, but not a deadly or dangerous weapon.