Book 2: Investigation of Offences, Collection of Evidence and Initial Investigation
Section 4: The Initial Investigation 51-86
Chapter 2: Hearing Witnesses 58-68
Article 64
A. No question may be addressed to a witness without the permission of the investigative judge or [judicial] investigator and no questions may be put to a witness that are not relevant to the case or which impinge upon others. A witness may not be addressed in a declaratory or insinuating manner and no sign or gesture may be directed at him that would tend to intimidate, confuse or distress him.
B. A witness may not be prevented from giving evidence that he wishes to give and may not be interrupted while giving it, unless he speaks at undue length on matters not relevant to the case or on matters that impinge on others, offend common decency or infringe security.
1. The Court shall have jurisdiction over the following offences against its administration of justice when committed intentionally:
(c) 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;