Which crime involves receiving or assisting an offender after the fact as per 18 USC § 3?

The crime defined by 18 USC § 3 specifically refers to the term "Accessory after the fact." This statute addresses individuals who aid another person knowing that they have committed a felony, with the intent to help the perpetrator evade arrest, trial, or conviction. An accessory after the fact does not participate in the commission of the crime itself but becomes involved afterward, which makes their actions criminal under this law.

Being classified as an accessory after the fact implies a critical understanding of the legal implications tied to helping someone who has already committed a crime. This might include actions like hiding the offender, providing them with resources to avoid law enforcement, or offering other forms of assistance that impede justice.

In contrast, conspiracy to commit an offense would involve planning or agreeing to commit a crime, thus differentiating it from providing post-crime assistance. Simple assault refers specifically to an act of physical harm or threat and is unrelated to aiding an offender. Perjury involves lying under oath and does not pertain to the assistance of an offender after a crime has been committed.

Thus, the choice related to "Accessory after the fact" accurately encapsulates the legal definition and implications set forth in 18 USC § 3.