'Misprision of Felony,' is the like the concealment of a felony.
BUT you must not have given ANY type of assistance to the
perpetrator WHATSOEVER, in the commission of the crime (or
afterwards), because if it can be proven that you did, you become
an "Accessory After The Fact" and can be charged with the
offense.
This particular crime can be charged as a FEDERAL offense under
USC, Title 18, if the original crijme was a federal offense. If
not, Georgia and all other states have similarly worded offenses
(misprision) on their statute books. MISPRISION OF FELONY (Federal)
- Whoever, having knowledge of the actual commission of a felony
cognizable by a court of the U.S., conceals and does not as soon as
possible make known the same to some judge or other person in civil
or military authority under the U.S. 18 USC.
http://www.lectlaw.com/def2/m034.htm