ACCESSORY AFTER THE FACT
Whoever, knowing that an offense has been committed, receives, relieves, comforts or assists the offender in order to hinder or prevent his apprehension, trial or punishment, is an accessory after the fact; one who knowing a felony to have been committed by another, receives, relieves, comforts, or assists the felon in order to hinder the felon’s apprehension, trial, or punishment. U.S.C. 18
“In the United States, a person who learns of the crime and gives some form of assistance before the crime is committed is known as an “accessory before the fact”. A person who learns of the crime after it is committed and helps the criminal to conceal it, or aids the criminal in escaping, or simply fails to report the crime, is known as an “accessory after the fact”. A person who does both is sometimes referred to as an “accessory before and after the fact”, but this usage is less common.”
