PART XII
OTHER OFFENCES RELATING TO THE ADMINISTRATION OF JUSTICE
Deceiving witnesses
108. Any person who practises any fraud or deceit, or knowingly makes or exhibits any false statement, representation, token or writing, to any person called or to be called as a witness in any judicial proceeding, with intent to affect the testimony of such person as a witness, shall be guilty of a misdemeanour.
Destroying evidence
109. Any person who, knowing that any book, document, or thing of any kind whatsoever is or may be required in evidence in a judicial proceeding, wilfully removes or destroys it or renders it illegible or undecipherable or incapable of identification, with intent thereby to prevent it from being used in evidence, shall be guilty of a misdemeanour.
Conspiracy to defeat justice and interference with witnesses
110. Any person commits a misdemeanour who-
(a) conspires with any other person to accuse any person falsely of any crime or to do anything to obstruct, prevent, pervert or defeat the course of justice; or
(b) in order to obstruct the due course of justice, dissuades, hinders or prevents any person lawfully bound to appear and give evidence as a witness from so appearing and giving evidence or endeavours to do so; or
(c) obstructs or in any way interferes with or knowingly prevents the execution of any legal process, civil or criminal.
Offences against administration of justice
Corruptly influencing a witness, obstructing or interfering with the attendance or testimony of a witness, retaliating against a witness for giving testimony or destroying, tampering with or interfering with the collection of evidence
EDIT.