More on Assisting an Offender:
Assisting an Offender - section 4(1) Criminal Law Act 1967
The offence of assisting an offender ("the principal offender") is committed when:
*the principal offender has committed an arrestable offence;
*the accused knows or believes that the principal offender has committed that or some other arrestable offence;
*the accused does any act with intent to impede the apprehension or prosecution of the principal offender; and
*the act is done without lawful authority or reasonable excuse.
It is an offence triable only on indictment unless the principal offence is an either way offence, in which case the offence of assisting a principal offender is also triable either way. The maximum sentence for the offence varies from three to ten years' imprisonment, depending on the punishment applicable to the principal offence: s.4(3).
Proceedings may only be instituted by or with the consent of the Director of Public Prosecutions: s.4(4). Consent may be granted after charge but must be before committal proceedings (indictable offences) or mode of trial (either way offences). Consent must be obtained before proceedings are started by way of summons. It is not an offence to attempt to commit an offence under section 4.
Examples of the type of conduct appropriate for a charge of assisting an offender include:
*hiding a principal offender;
*otherwise assisting a principal offender to avoid arrest;
*assisting a principal offender to abscond from bail;
*lying to the police to protect principal offenders from investigation and prosecution;
*hiding the weapon used in an assault/robbery;
*washing clothes worn by a principal offender to obstruct any potential forensic examination.There may be an overlap between the offence of assisting an offender and obstructing a constable, wasting police time, concealing arrestable offences (s.5(1) Criminal Law Act 1967) and perverting the course of justice .
The courts have made it clear that assisting an offender is a serious offence and, if the statutory offence of assisting an offender can be charged, it should normally be preferred over common law offences.
However, the common law offence of perverting the course of justice should be considered when:
*the assisting is aimed at preventing or hindering the trial process (as opposed to the arrest or apprehension of an accused);
*the facts are so serious that the court's sentencing powers for the statutory offence are considered inadequate;
*admissible evidence of the principle offence is lacking
http://www.cps.gov.uk/legal/p_to_r/public_justice_offences_incorporating_the_charging_standard/#a26