Preuve témoignage

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Cette page a été mise à jour ou révisée de manière substantielle pour la dernière fois January 2018. (Rev. # 2111)

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Introduction

The "truth-seeking process of a trial is predicated on the presentation of evidence in court" be it real evidence or testimony.

The trier-of-fact directly hears testimony "so there is no concern that the evidence was recorded inaccurately". Direct evidence also allows for the trier of fact to have "robust tools for testing the truthfulness of evidence and assessing its value." Assessment of truthfulness can be assessed by demeanour. And through cross examination.

Testimonial evidence, also known as viva voce evidence or oral evidence, is evidence given by a witness in the form answers to posed questions.

When a competent witness has taken the stand, he "is required to answer all relevant questions put to him." There exist exceptions for questions invoking privileged information and certain self-incriminatory information. However, as a general rule, even incriminating questions must be answered.

The "involuntary participation of non-involved persons in litigation is a longstanding tradition of the legal system."

Every person "has a duty to testify to that which they have witnessed."

Purpose of Testimonial Evidence

Testimonial evidence is the best way to ensure the most reliable and credible evidence is available for the trier of fact to consider.

Witnesses are encouraged to be honest, accurate, and complete by requiring them to give evidence under the requirements that:

1. the witness give an oath or affirmation to their evidence;
2. their personal presence is necessary;
3. they will be subject to cross-examination

Calling Witnesses

The usual manner that a witness testify is by oral testimony in court (viva voce evidence) while the accused is present. (CCC s.650(1))

The witnesses' testimony must be relevant, material, and admissible. To see details on the scope of these requirements see Evidence.

Identifying witnesses and Using Pseudonyms

The Court has discretion to allow a witness to testify under a pseudonym only where a failure to do so would interfere with the administration of justice. This includes where the witness has reason to fear for their life.

Preparing Witnesses

The presence of a police officer who is taking notes during an interview, can be enough to insulate Crown counsel from being compelled to testify to the meeting.

New Disclosures

Failure to disclose new information learned during witness preparation that may have affected trial preparations may be fatal to a prosecution.

Showing Documents to Witnesses

While not strictly prohibited, it is preferable that witnesses be not shown documents written by counsel. Depending on the circumstances, merely reviewing the subject matters flagged as important in a notice of application can be acceptable preparation of a witness.

By permitting one witness to see the written statement of another witness may sufficiently taint their evidence so as to be prohibited from testifying.

Impermissible Reasons for Calling Witnesses

The Crown may not call a witness whose evidence does not advance their case, but it merely for the purpose of cross-examining to show them not to be credible. Where such a witness is called, the judge should have provided limiting instructions explaining that absence collusion, a jury cannot draw any adverse inferences against the accused due to the negative finding of credibility against the witness.

Communicating with Witnesses During Testimony

Communication with Witness After Cross-examination But Before Re-Direct

There is variable positions on whether counsel can talk to a witness between cross-examination and re-examination. Generally leave of the court may be required first.

Exclusion of Witnesses

• Orders to Exclude Witnesses from Court

Recalling Witnesses

The judge has discretion to permit that a witness be recalled to be cross-examined further. This can include re-calling the accused to be cross-examined further. However, this discretion should be "exercised very cautiously."

The judge may also permit the Crown to re-open its case and call witnesses they initially chose not to call where that decision was influenced by the conduct of defence counsel.

Choice of Witnesses

Any party is entitled to call a witness who is competent to testify (See Competence and Compellability for details on competency of witnesses).

A party is also permitted call a witness that has already previously been called by the opposing party.

A party cannot call a witness for the sole purpose of discrediting a witness who has made a previous inconsistent statement.

Failure to Call a Witnesss

The failure to call a witness can be used to make an adverse inference where there is no plausible reason not to do so and it is well within the power of the party to do so. However, where the evidence is merely cumulative or inferior en it should not be taken into account.

A failure to call a witness cannot be used to make a negative inference on the credibility of the accused.

Crown Discretion to Call Witnesses

The Crown is under no obligation to subpeona or call witnesses for the benefit of the Defence. The defence are able to subpeona the witnesses themselves.

Failure of Accused to Testify

The failure of an accused to testify cannot be used to infer guilt. A weak prosecution case should not be strengthened in any way through the accuseds' failure to testify.

However, where the Crown sets out a case that "cries out for an explanation", the failure to testify fails to provide any basis to infer anything else but guilt.

Witnesses Refusing to Testify

Procedure where Witness Refuses to Testify

Witness refusing to be examined

545 (1) Where a person, being present at a preliminary inquiry and being required by the justice to give evidence,

(a) refuses to be sworn,

(b) having been sworn, refuses to answer the questions that are put to him,

(c) fails to produce any writings that he is required to produce, or

(d) refuses to sign his deposition,

without offering a reasonable excuse for his failure or refusal, the justice may adjourn the inquiry and may, by warrant in Form 20 [formes], commit the person to prison for a period not exceeding eight clear days or for the period during which the inquiry is adjourned, whichever is the lesser period.

Further commitment

(2) Where a person to whom subsection (1) [witness refusing to be examined] applies is brought before the justice on the resumption of the adjourned inquiry and again refuses to do what is required of him, the justice may again adjourn the inquiry for a period not exceeding eight clear days and commit him to prison for the period of adjournment or any part thereof, and may adjourn the inquiry and commit the person to prison from time to time until the person consents to do what is required of him.

Saving

(3) Nothing in this section shall be deemed to prevent the justice from sending the case for trial on any other sufficient evidence taken by him.
R.S., c. C-34, s. 472.
[annotation(s) ajoutée(s)]

– CCC (CanLII), (Jus.)

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Section 545 does not permit a justice to make an order of contempt against a witness who refuses to testify at a preliminary inquiry.

A witness charged with contempt of court for refusing to testify against gang members due to fear to safety can rely on the defence of duress.

Topics

• Competence and Compellability
• Refreshing Memory
• Testimonial Aids
  • Testimonial Aids for Young, Disabled or Vulnerable Witnesses (Screens and Video-links)
  • Interpreters
• Evidence by Commission
• Analyzing Testimony
• Remote Attendance

See Also

• Trial Process (Cases)
• Hearsay