CA — Evidence — Quiz 1
The Canadian law of evidence — admissibility, hearsay, and the principled approach.
- 1.
A police officer arrests a suspect for robbery and immediately begins questioning him in the back of the patrol car without informing him of his right to counsel. The suspect says, 'I was there but I didn't mean to hurt anyone.' At trial the Crown seeks to admit this statement. Which is the MOST accurate statement of the applicable Canadian law?
- 2.
At a civil trial, a plaintiff seeks to introduce evidence that the defendant, three years before the events in issue, was convicted of fraud in an unrelated matter, arguing it shows the defendant's 'dishonest character' and therefore his likely dishonest conduct in the present case. The defendant objects. What is the most accurate statement of the applicable evidentiary principle?
- 3.
The Crown charges an accused with importing cocaine. A customs officer testifies that she smelled a strong odour of narcotics from a package, and that in her 12 years of experience she had smelled cocaine hundreds of times and was certain the smell was cocaine. The defence moves to exclude this as inadmissible lay opinion. How should the trial judge rule?
- 4.
During a voir dire on the admissibility of an accused's confession, the accused testifies that he confessed only because the detective promised him he would 'go home tonight' if he cooperated. The Crown presents no evidence contradicting this account. What result follows under the confessions rule?
- 5.
In a family law proceeding, a mother seeks to introduce into evidence a text message exchange between the father and a third party, in which the father allegedly made threats. The messages were obtained by the mother from the third party, who has since moved abroad and is unwilling to testify. The father denies the messages are genuine. What is the PRIMARY evidentiary issue the court must address before the messages can be used?
- 6.
A journalist is subpoenaed to testify in a criminal trial and ordered to reveal the identity of a confidential source who disclosed information about alleged police misconduct. The journalist refuses, claiming a 'newspaper privilege.' Which statement most accurately reflects Canadian law on this issue?
- 7.
Crown counsel in a fraud prosecution seeks to introduce evidence that, on five previous occasions over ten years, the accused used essentially identical false pretences to defraud investors. The accused objects that this is impermissible character evidence. On the facts as described, what is the most accurate analysis?
- 8.
In a civil negligence action, the plaintiff's counsel learns that the defendant company conducted an internal investigation report shortly after the accident and seeks production of it. The defendant claims litigation privilege. The plaintiff argues that the dominant purpose of the report was safety compliance, not litigation. Which principle governs, and what result?
Questions & answers
1. A police officer arrests a suspect for robbery and immediately begins questioning him in the back of the patrol car without informing him of his right to counsel. The suspect says, 'I was there but I didn't mean to hurt anyone.' At trial the Crown seeks to admit this statement. Which is the MOST accurate statement of the applicable Canadian law?
Answer: Under the confessions rule, the Crown must prove beyond a reasonable doubt that the statement was made voluntarily; additionally, the s. 10(b) Charter breach may require the court to consider exclusion under s. 24(2).
The confessions rule (Ibrahim rule as received into Canadian law) requires the Crown to prove voluntariness beyond a reasonable doubt before a statement made by an accused to a person in authority can be admitted. This is a common law rule applicable independently of the Charter. In addition, the failure to inform the suspect of the right to retain and instruct counsel before questioning constitutes a breach of s. 10(b) of the Charter, which may trigger exclusion under s. 24(2) (the Grant analysis). Option A is wrong: spontaneous utterances are not automatically admissible when made to persons in authority; voluntariness must still be established. Option B is wrong: the statement is an admission by a party-opponent and the hearsay concern is addressed by the confessions rule and party admissions doctrine, not by simple hearsay exclusion. Option D is wrong: past recollection recorded is an exception dealing with a witness's own prior record of facts they no longer remember; it does not apply to a suspect's statement. Option E is wrong: the confessions rule applies to both oral and written statements made to persons in authority.
2. At a civil trial, a plaintiff seeks to introduce evidence that the defendant, three years before the events in issue, was convicted of fraud in an unrelated matter, arguing it shows the defendant's 'dishonest character' and therefore his likely dishonest conduct in the present case. The defendant objects. What is the most accurate statement of the applicable evidentiary principle?
Answer: Evidence of the defendant's prior misconduct offered solely to prove disposition to act dishonestly is presumptively inadmissible; to be admitted, its probative value in context must outweigh its prejudicial effect, including the risk of reasoning from bad character to guilt.
The general rule against propensity or disposition reasoning — that evidence of prior bad character is inadmissible if its only purpose is to invite the inference 'he did it before, so he probably did it again' — applies in both criminal and civil proceedings. The evidence must be excluded unless its probative value, in light of a proper purpose beyond mere disposition, outweighs its prejudicial effect (including moral prejudice and the risk of distraction). This principle is grounded in the probative-value/prejudicial-effect balancing that underlies Canadian evidence law generally, consistent with the framework discussed in R v Mohan and the broader common law. Option A is wrong: while civil evidence rules may differ in some respects, the character/propensity rule is not simply abandoned. Option B is wrong: the evidence is not admitted automatically as similar fact evidence; a careful analysis of purpose and the probative/prejudicial balance is required. Option D is wrong: the similar fact/disposition rule applies in civil proceedings. Option E is wrong: while a prior conviction may be admissible and carries significant weight, it is not 'conclusive' on all facts and does not eliminate the requirement to assess admissibility for the purpose sought here (disposition inference).
3. The Crown charges an accused with importing cocaine. A customs officer testifies that she smelled a strong odour of narcotics from a package, and that in her 12 years of experience she had smelled cocaine hundreds of times and was certain the smell was cocaine. The defence moves to exclude this as inadmissible lay opinion. How should the trial judge rule?
Answer: Admit it, because a lay witness with sufficient personal experience may give opinion evidence on matters within her ordinary perception and experience, and the officer's 12 years of sensory experience provides a sufficient foundation.
Canadian evidence law distinguishes between expert opinion and lay opinion. A lay witness may give opinion evidence that is a shorthand for a collection of perceptions, provided the witness has a sufficient basis in personal experience. Identification of a smell based on extensive direct personal experience (12 years, hundreds of encounters) falls within admissible lay opinion — it is a practical inference from perceived facts, not a scientific theory requiring formal qualification. The Mohan framework applies to expert opinion tendered to assist the trier of fact on matters beyond common experience; it does not convert all opinion into expert opinion requiring formal qualification. Option A is wrong: courts routinely admit lay opinion on sensory matters (smell, colour, speed) based on experience. Option C is wrong: the Mohan qualification process is for expert witnesses, not lay witnesses giving opinions grounded in personal perception. Option D is wrong: formal qualification proceedings are for expert witnesses; the officer here testifies as a lay witness. Option E is wrong: there is no such presumption in Canadian evidence law.
4. During a voir dire on the admissibility of an accused's confession, the accused testifies that he confessed only because the detective promised him he would 'go home tonight' if he cooperated. The Crown presents no evidence contradicting this account. What result follows under the confessions rule?
Answer: The confession must be excluded; the Crown has not discharged its burden of proving voluntariness beyond a reasonable doubt, and an inducement in the form of a promise of leniency renders the confession involuntary.
Under the confessions rule, the Crown bears the burden of proving beyond a reasonable doubt that a statement made by the accused to a person in authority was voluntary. A promise of a benefit or leniency — even an implied one such as 'you'll go home tonight' — is a classic inducement that negates voluntariness by operating on the accused's hope of advantage. With the Crown presenting no contradictory evidence, it cannot discharge its burden, and the confession must be excluded. Option A is wrong: the confessions rule applies pre-charge, and the choice to speak does not waive voluntariness requirements. Option C is wrong: courts look at the substance of inducements, not their precise wording; a promise to be released is a significant inducement. Option D is wrong: an accused's testimony on voir dire, while it cannot be used as evidence of guilt at trial (s. 13 Charter), is admissible and considered on the voir dire itself. Option E is wrong: the burden rests on the Crown, not the accused, and the standard is proof beyond a reasonable doubt of voluntariness, not a balance-of-probabilities showing of causation by the accused.
5. In a family law proceeding, a mother seeks to introduce into evidence a text message exchange between the father and a third party, in which the father allegedly made threats. The messages were obtained by the mother from the third party, who has since moved abroad and is unwilling to testify. The father denies the messages are genuine. What is the PRIMARY evidentiary issue the court must address before the messages can be used?
Answer: Authentication — whether there is sufficient evidence that the messages are what they are claimed to be (i.e., genuine communications from the father) — must be established before the messages can be considered; thereafter, hearsay and other relevance issues may also arise.
Authentication is a foundational requirement for documentary and electronic evidence: before the court can treat a document as what the proponent claims it is, there must be sufficient evidence (direct or circumstantial) to support that finding. For text messages, this may include metadata, phone records, account information, surrounding context, or witness testimony identifying the communications. Without authentication, the document has no established identity and cannot rationally be used as evidence. Once authentication is addressed, hearsay (the father's statements are admissions by a party-opponent and may be admissible on that basis), best evidence, and other issues follow. Option A is wrong: hearsay is important but authentication is logically prior — a document must be authenticated before its contents can be characterized. Option C is wrong: the manner of obtaining evidence affects admissibility under s. 24(2) of the Charter in criminal proceedings and may raise privacy concerns, but the third party voluntarily sharing their own messages is not equivalent to interception; this does not automatically render the evidence inadmissible. Option D is wrong: there is no absolute rule requiring the author's testimony; documents can be authenticated by other means. Option E is wrong: text messages between individuals are not business records simply because a commercial platform carries them.
6. A journalist is subpoenaed to testify in a criminal trial and ordered to reveal the identity of a confidential source who disclosed information about alleged police misconduct. The journalist refuses, claiming a 'newspaper privilege.' Which statement most accurately reflects Canadian law on this issue?
Answer: There is no recognized class privilege for journalists in Canada; any claim to protection for a confidential source must be assessed on a case-by-case basis using the Wigmore four-part test, balancing the public interest in protecting sources against the importance of the evidence to the proceedings.
Canadian courts have consistently held that there is no class privilege for journalists. Claims to protect a confidential source are assessed on the Wigmore criteria (case-by-case privilege): (1) the communication originated in confidence; (2) confidentiality is essential to the full and satisfactory maintenance of the relationship; (3) the relationship is one that society ought to foster; (4) injury from disclosure would be greater than the benefit gained from correct disposal of the proceedings. Courts balance these factors, considering the relevance and necessity of the evidence, the importance of the source protection to journalism, and the nature of the proceedings. Option A is wrong: no absolute newspaper privilege exists in Canadian law. Option C is wrong: while s. 2(b) protects freedom of the press and may be a factor in the Wigmore analysis, it does not create an automatic privilege overriding court process. Option D is wrong: police informer privilege is a specific, well-established class privilege rooted in different policy considerations; it does not automatically extend to journalistic sources, who are treated differently. Option E is wrong: a journalist may assert the claim and have it adjudicated; refusing to answer pending a ruling is not automatically contempt.
7. Crown counsel in a fraud prosecution seeks to introduce evidence that, on five previous occasions over ten years, the accused used essentially identical false pretences to defraud investors. The accused objects that this is impermissible character evidence. On the facts as described, what is the most accurate analysis?
Answer: The evidence is admissible as similar fact evidence if the trial judge is satisfied that its probative value — particularly its capacity to prove identity, a distinctive system, or absence of innocent intent — substantially outweighs its prejudicial effect, including the moral prejudice and the risk that the jury will convict on propensity reasoning.
The admissibility of similar fact evidence in Canada is governed by a probative-value-versus-prejudicial-effect analysis. The Crown must satisfy the trial judge that the evidence is sought for a proper purpose beyond mere propensity (such as proving identity through a distinctive modus operandi, negating accident or innocent intent, or establishing a system of fraud), and that on the balance, probative value substantially outweighs prejudicial effect (including both moral prejudice — the jury condemning on bad character — and reasoning prejudice — the jury using the evidence improperly). The striking similarities across five incidents using identical false pretences over a pattern could strongly support admission for the purpose of proving the scheme, intent, and absence of innocent mistake. Option A is wrong: similar fact evidence is a recognized exception to the exclusionary character rule when the proper analysis is satisfied. Option C is wrong: there is no numerical threshold in Canadian law; the analysis is qualitative, not quantitative. Option D is wrong: similar fact evidence need not be restricted to prior convictions; uncharged acts can be used if sufficiently probative, though the lack of a conviction may affect weight. Option E is wrong: there is no blanket rule admitting character evidence in fraud cases; the similar fact balancing test always applies.
8. In a civil negligence action, the plaintiff's counsel learns that the defendant company conducted an internal investigation report shortly after the accident and seeks production of it. The defendant claims litigation privilege. The plaintiff argues that the dominant purpose of the report was safety compliance, not litigation. Which principle governs, and what result?
Answer: Litigation privilege protects communications and documents created for the dominant purpose of existing or reasonably anticipated litigation; if the court finds the dominant purpose of the report was safety compliance or regulatory obligation rather than litigation, the privilege does not attach and the report must be produced.
Litigation privilege (also called work product privilege in Canadian usage) protects materials prepared for the dominant purpose of litigation that is reasonably anticipated or ongoing. The key criterion is dominant purpose: if the primary reason for creating the document was something other than litigation — such as regulatory compliance, safety improvement, or business operations — the privilege does not apply even if litigation was one purpose among several. Courts conduct a factual inquiry into purpose. This is distinct from solicitor-client privilege, which protects confidential communications between lawyer and client for the purpose of obtaining legal advice and is not subject to the 'dominant purpose' test in the same way. Option A is wrong: solicitor-client privilege and litigation privilege are distinct doctrines with different criteria; lawyer supervision does not automatically confer either. Option C is wrong: reasonable anticipation of litigation is necessary but not sufficient — the document must also have been created for the dominant purpose of that anticipated litigation, not for independent operational reasons. Option D is wrong: in fact, solicitor-client privilege is the near-absolute privilege; litigation privilege is more qualified and can be overridden in certain circumstances (e.g., when litigation ends, or in exceptional cases involving third-party relevance). Option E is wrong: litigation privilege can attach to documents prepared by non-lawyers at the direction of counsel or by the party itself for the dominant purpose of litigation.