United Kingdom of Great Britain and Northern Ireland
4 Penalties for assisting offenders.
(1) Where a person has committed an arrestable offence, any other person who, knowing or believing him to be guilty of the offence or of some other arrestable offence, does without lawful authority or reasonable excuse any act with intent to impede his apprehension or prosecution shall be guilty of an offence.
[(1A)In this section and section 5 below "arrestable offence" has the meaning assigned to it by section 24 of the Police and Criminal Evidence Act 1984.]
Individual criminal responsibility
Assisting
EDIT.