impeding apprehension or prosecution
Giving assistance to a person one knows to be guilty of an indictable offence with the intention of preventing or delaying his arrest or prosecution (e.g. providing a hiding place or destroying evidence). There are also special offences of (1) agreeing not to disclose information that might help to convict or prosecute a criminal (see compounding an offence), (2) refusing to aid a police officer when asked to help stop a breach of the peace, (3) obstructing a police officer, and (4) wasting police time by giving them misleading information. See also escape.