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Can Someone Be Convicted of Sexual Assault in Canada on the Complainant’s Testimony Alone?
Joseph A. Neuberger, Michael P. Bury, and Diana Davison, Neuberger & Partners LLP, Criminal Lawyers Toronto
THE SHORT ANSWER
Yes — and it happens regularly. But “yes” is only the first half of the answer, and the second half is where most of the law lives: the Crown still must prove every element of the criminal offence alleged beyond a reasonable doubt, and a conviction can never rest on nothing more than believing one witness over another.
It is one of the most common questions people ask after a charge is laid, and one of the most misunderstood. There’s a widespread assumption that criminal cases require “hard evidence” — DNA, injuries, a video, a witness — and that without it, there’s no case. That assumption is wrong in Canada, and it has been wrong for more than forty years.
Here’s how it actually works.
1. • TESTIMONY IS EVIDENCE
The starting point is a definitional one that trips a lot of people up. When someone says “there’s no evidence, it’s just her word against mine,” they usually mean there’s no physical evidence. But sworn testimony given in a courtroom, under oath, subject to cross-examination, is evidence. It’s often the most important evidence in the room.
Sexual assault cases are, by their nature, usually committed in private. If Canadian law required independent confirmation, the vast majority of these cases could never be prosecuted at all — a point courts have made explicitly. The law does not require any confirmatory evidence and sex assault charges are routinely prosecuted based entirely on the evidence of the complainant.
2. • THE CORROBORATION REQUIREMENT WAS ABOLISHED IN 1983
Historically, the common law treated complainants in sexual assault cases as inherently suspect. Judges were required to warn juries that it was dangerous to convict without corroboration, and there were related rules — the “doctrine of recent complaint,” for instance — that penalized anyone who didn’t report immediately.
Parliament swept those rules away as part of the 1983 sexual assault reforms. Section 274 of the Criminal Code now says plainly that for offences including sexual assault (s. 271), sexual assault with a weapon (s. 272), and aggravated sexual assault (s. 273), no corroboration is required for a conviction, and a judge must not instruct a jury that it is unsafe to convict without it.
The Supreme Court has confirmed the same principle repeatedly. In R. v. W.(R.), [1992] 2 S.C.R. 122, the Court stated there is no rule requiring a complainant’s evidence in a sexual assault case to be corroborated.
Related reforms went further:
Thus, the legal barrier to conviction on a single account is gone. What remains is the evidentiary one, and it is not small.
3. • THE REAL QUESTION ISN’T CORROBORATION — IT’S PROOF BEYOND A REASONABLE DOUBT
Removing the corroboration rule did not lower the standard of proof. The Crown must still prove, beyond a reasonable doubt, that the impugned sexual touching occurred, that the accused did it, and that the complainant did not consent (plus, where relevant, that the accused had no honest but reasonable mistaken belief in communicated consent).
A single witness can meet that standard. A single witness can also fall well short of it. The difference comes down to two concepts that courts insist on keeping separate:
| THE TEST | WHAT IT ASKS |
|---|---|
| Credibility | Is the witness being honest? Are they trying to tell the truth? |
| Reliability | Is the witness accurate? Honest people misremember. Intoxication, the passage of time, trauma, and suggestion all degrade memory without any dishonesty at all. |
A complainant can be entirely credible and still not be reliable enough on a key detail to ground a conviction. Defence work in these trials is very often aimed at reliability rather than at accusing anyone of lying. Although, we often find in sex assault cases, that complainants have an agenda, and we are able to determine a motive to fabricate. Both are important and each case must be carefully assessed.
4. • THE W.(D.) FRAMEWORK: A CONVICTION CAN’T BE A POPULARITY CONTEST
When the accused also testifies, the trial judge must work through the framework from R. v. W.(D.), [1991] 1 S.C.R. 742:
That third step is the crucial one. Disbelieving the accused is not the same as being satisfied of guilt. It is a legal error to infer guilt merely from having rejected the accused’s testimony.
CASE IN FOCUS — R. v. Berg, 2026 SCC 21
Berg involved a straight conflict of accounts — the complainant said she did not consent, the accused said the encounter was consensual — with no frailty in either account standing alone. The Court dismissed the appeal but took the opportunity to correct a widespread misuse of a 2006 Ontario Court of Appeal decision, R. v. J.J.R.D. Trial judges had been leaning on it to reject an accused’s evidence simply because they accepted the complainant’s. The Supreme Court clarified that J.J.R.D. was about the sufficiency of reasons on appellate review, not a tool for trial judges, and warned that using it that way risks turning trials into credibility contests — precisely what W.(D.) was designed to prevent.
A guilty verdict cannot rest solely on the trier of fact finding one side more believable.
That’s the sharpest available statement of the limit: yes, a complainant’s testimony can convict — but not because a judge simply preferred it.
5. • MYTHS AND STEREOTYPES ARE ERRORS OF LAW — IN BOTH DIRECTIONS
Judges are not permitted to reason from stereotypes about how a “real” victim of sexual or domestic assault behaves. There is no legal expectation that a complainant report immediately, resist physically, avoid the accused afterward, or display particular emotion on the stand. Reasoning of that kind is an error of law that can get a verdict overturned.
The same discipline applies to the accused. Assumptions about how a man “would” behave in a relationship, untethered to the evidence, are equally improper.
In R. v. Kruk, 2024 SCC 7, the Supreme Court declined to recognize a freestanding “rule against ungrounded common-sense assumptions” as its own error of law, holding that reliance on common-sense generalizations in credibility assessment is ordinarily reviewed as a question of fact. Credibility assessment, the Court acknowledged, is often the single most important determination a trial judge makes. Myths and stereotypes about sexual assault remain errors of law; ordinary reasoning about human behaviour, grounded in the evidence, does not.
6. • SO, WHAT DOES A “TESTIMONY-ONLY” TRIAL ACTUALLY LOOK LIKE?
Rarely as bare as the phrase suggests. Even without forensics, cases usually involve:
Convictions do follow from a complainant’s account alone. So do acquittals — frequently — where the account can’t bear the weight of cross-examination and the criminal standard.
7. • ON APPEAL, CREDIBILITY FINDINGS ARE HARD TO DISLODGE
Appeal courts don’t hear witnesses. They defer heavily to the trial judge, who watched the testimony unfold. An appellant generally can’t succeed by arguing that the judge should have believed someone else; they need to identify a legal error — improper stereotypical reasoning, a misapprehension of material evidence, a failure to apply W.(D.) properly, or reasons so inadequate that meaningful review is impossible.
That’s a demanding threshold, which is one reason these cases are effectively won or lost at trial.
— • THE BOTTOM LINE
Can you be convicted on the complainant’s testimony alone in a sex assault or domestic assault case in Canada? Yes. Corroboration hasn’t been required since 1983, and the Supreme Court has affirmed the point for decades.
But that principle sits alongside an equally firm one: the presumption of innocence isn’t diluted because a case turns on competing accounts. The Crown still carries the full burden. The testimony still must be credible and reliable enough to remove reasonable doubt. And as Berg makes clear, a conviction cannot rest on merely preferring one witness to another.
Both things are true at once. Most of the public confusion about these trials comes from picking one and ignoring the other without a proper understanding of the importance of the burden of proof remaining on the Crown.
This post is general legal information, not legal advice, and it is not a substitute for consulting a lawyer. The law described here is Canadian federal criminal law; procedure and practice vary by province, and the law continues to develop. If you are facing charges or considering reporting an offence, speak to a criminal lawyer about your specific situation. Neuberger & Partners LLP, Sex Assault Defence Lawyers Toronto.
