- Since R. v. Stinchcombe (1991 SCC), the Crown has a constitutional obligation to disclose all relevant material in its possession, whether it helps or hurts its own case.
- This obligation flows from the accused's Charter section 7 right to make full answer and defence — it is not a courtesy, it is a legal requirement.
- Disclosure is ongoing, not a one-time event — the Crown must keep disclosing new material as it comes to light, including right up to and during trial.
- Disclosure has real limits: privileged material (like informer identity) is protected, and records held by third parties require a separate O'Connor application.
- Late, incomplete, or lost disclosure can lead to adjournments, costs orders against the Crown, or — in serious cases — a stay of proceedings.
- Reviewing full disclosure carefully with a lawyer before any plea decision is essential — this is often where real defences are found.
The Short Answer
If you are charged with a criminal offence in Ontario, you are constitutionally entitled to see the evidence the Crown has gathered against you — all of it, not just the parts that support a conviction. This is called disclosure, and it is not a professional courtesy extended by the prosecutor's office. It is a legal obligation rooted in the Canadian Charter of Rights and Freedoms, and it shapes almost every decision that follows in a criminal case, from bail to trial strategy to whether a plea makes sense at all.
Understanding what disclosure is supposed to include, how the obligation keeps evolving as a case proceeds, and what happens when the Crown falls short of it, is essential for anyone navigating the Ontario criminal justice system.
The Stinchcombe Rule: Where This Obligation Comes From
The modern Canadian law of disclosure traces directly to a single Supreme Court of Canada decision: R. v. Stinchcombe, decided in 1991. Before Stinchcombe, disclosure practices across Canada were inconsistent — some Crown offices disclosed generously, others gave the defence very little until trial was already underway. The Supreme Court put an end to that patchwork.
The Supreme Court held that the Crown has a legal duty to disclose all relevant information in its possession or control to the defence — whether or not the Crown intends to use that information at trial, and whether it helps or hurts the Crown's own case. The only relevant question is relevance, not whether the material is convenient for the prosecution.
This is a significant departure from how many people assume criminal trials work. A prosecutor is not simply an advocate trying to win — in Canadian law, the Crown's role is understood as a public duty to see that justice is done, not merely to secure convictions. Withholding evidence that might help an accused person, even unhelpful evidence to the Crown's theory, would be inconsistent with that role.
Critically, the Court grounded this obligation in the Charter, not just professional ethics or ordinary court rules. The right to make full answer and defence is protected as a principle of fundamental justice under section 7 of the Charter — the guarantee of life, liberty, and security of the person. An accused cannot meaningfully answer a case they have not been allowed to see. That constitutional foundation is what makes the disclosure obligation so powerful, and why breaches of it are taken seriously by Ontario courts.
What Disclosure Typically Includes
The scope of disclosure depends heavily on the nature of the charge, but in most Ontario criminal cases, defence counsel can expect to receive a broad package of material relevant to the investigation and prosecution.
| Category | What It Typically Includes |
|---|---|
| Police officer notes | Handwritten or typed notes documenting the investigation, arrest, and observations of each officer involved |
| Witness statements | Statements given by complainants, witnesses, and other individuals interviewed by police |
| The accused's own statements | Any statements made by the accused to police, whether formally recorded or noted informally |
| Video and audio recordings | Body-worn camera footage, in-car camera footage, 911 call recordings, and interview room recordings |
| Forensic and expert reports | DNA analysis, toxicology reports, breath or blood test results, digital forensic examinations, and other expert findings |
| Criminal records of witnesses | Relevant criminal history of Crown witnesses that could bear on their credibility |
| Photographs and physical evidence records | Scene photographs, exhibit logs, and records of how evidence was seized and handled |
This is often referred to as the “fruits of the investigation” — everything the police and Crown gathered in building the case, not merely a curated summary of it. In more serious or complex matters, disclosure can run into thousands of pages and include extensive digital evidence.
In an impaired driving case, disclosure would typically include the arresting officer's notes, any breath test results and the maintenance records for the testing device used, dashcam or body-worn camera footage of the stop, and the 911 call if one was made. A defence lawyer reviewing this material might find inconsistencies between the officer's notes and the video, or gaps in how the testing equipment was maintained — issues that would never surface without full disclosure.
Disclosure Is an Ongoing Obligation
One of the most misunderstood aspects of disclosure is that it is not a single event that happens once, early in a case, after which the file is considered closed. The Crown's obligation is continuing. As new material comes into existence, or comes into the Crown's possession, it must be disclosed to the defence — even if that happens months into the proceedings, and even during trial itself.
- A forensic report completed after the first few court appearances must still be disclosed once it exists.
- A witness who comes forward later in the process, or a new statement taken from an existing witness, must be disclosed.
- Notes or records that surface from a related investigation may need to be disclosed if they are relevant.
- Corrections or updates to earlier disclosure — for example, a corrected version of a report — must also be provided.
Because disclosure keeps arriving, it is worth having a lawyer track what has been received against what should logically exist for a given type of charge — video evidence, maintenance records for a testing device, or a co-accused's statement, for example. Gaps are not always obvious unless someone is actively looking for them.
Limits and Exceptions
The disclosure obligation is broad, but it is not unlimited. Ontario courts recognize several categories of material that fall outside the standard disclosure package.
- Privileged material — most importantly, information that would reveal the identity of a confidential police informer is protected by informer identity privilege, one of the strongest forms of privilege recognized in Canadian law, subject to very narrow exceptions.
- Clearly irrelevant material — the Crown's obligation is to disclose relevant information, not literally every document that has ever touched the file.
- Solicitor-client privileged material — communications between the Crown and its own legal advisors are generally not subject to disclosure.
- Records held by third parties — material that is not in the Crown's possession or control at all, discussed further below.
Where the Crown claims that certain material is privileged or irrelevant and should not be disclosed, the defence can challenge that position, and in contested cases, a judge may review the material privately to determine whether the claim of privilege or irrelevance is justified.
Third-Party Records and O'Connor Applications
A common point of confusion is why the Crown cannot simply obtain and disclose records that are not already in its possession — for example, a complainant's private counselling records, medical records, or school records held by an unrelated institution or professional. The answer is that the ordinary Stinchcombe disclosure obligation applies only to material in the Crown's possession or control. Records held by a third party who is not part of the prosecution are not automatically part of that package.
Obtaining genuinely relevant third-party records requires a separate court procedure, commonly known as an O'Connor application after the Supreme Court decision that established the process. It involves the defence satisfying a judge that the records are likely relevant, followed by a court review of the material (often privately, by the judge) to weigh the accused's right to make full answer and defence against the third party's privacy interests before any portion is released.
This process exists because third-party records often involve significant privacy interests — particularly in sensitive contexts such as therapy records — and Canadian law tries to balance an accused person's right to a fair trial against the legitimate privacy expectations of people who are not on trial.
When Disclosure Is Late, Incomplete, or Lost
Disclosure problems are not rare, particularly in cases involving large volumes of digital evidence or multiple police services. When disclosure falls short, the response depends heavily on how serious the impact is on the accused's ability to make full answer and defence.
| Type of Problem | Typical Response |
|---|---|
| Late disclosure (material arrives close to trial) | Adjournment to give the defence adequate time to review and respond; in some cases, costs against the Crown |
| Incomplete disclosure (identifiable gaps) | Court order compelling production, or an adjournment pending resolution |
| Lost or destroyed evidence | Application addressing the loss; remedy depends on whether the loss was the result of unacceptable negligence and how significant the evidence was |
| Serious, prejudicial breach | In the most serious cases, a stay of proceedings — the charges are effectively brought to a permanent halt |
A full stay of proceedings for a disclosure failure is an exceptional remedy, reserved for cases where the breach has caused real, irreparable prejudice to the accused's right to a fair trial, or where continuing the prosecution would bring the administration of justice into disrepute. Courts generally try less drastic remedies first, such as adjournments or exclusion of specific evidence, before considering a stay.
Costs orders against the Crown, while less dramatic, are also a meaningful remedy — they signal that the court views the Crown's conduct as having caused real, unnecessary expense or delay for the defence, and they create an incentive for prosecutorial offices to take disclosure obligations seriously.
Why Reviewing Disclosure Matters Before Any Plea
Perhaps the single most important practical point in this entire area of law is this: you cannot make an informed decision about your case until you have seen and understood the full disclosure. This is true whether you are considering a guilty plea, weighing a Crown resolution offer, or preparing for trial.
- Disclosure often reveals inconsistencies between witness statements and later testimony.
- It can reveal procedural issues — such as problems with how a search was conducted or how a statement was obtained — that may support a Charter application to exclude evidence.
- It can reveal gaps in the Crown's evidence on an essential element of the offence.
- It gives a realistic sense of how a case is likely to unfold at trial, which shapes whether a plea negotiation makes sense and on what terms.
People sometimes want to resolve a criminal charge quickly, out of stress or a desire to simply move on. That instinct is understandable, but pleading guilty before disclosure has been reviewed means giving up the chance to identify a defence, a procedural issue, or leverage in negotiations that might never be apparent from the charge itself. This is precisely why defence lawyers insist on reviewing disclosure thoroughly before any final decision is made.
Common Myths
Myth: “The Crown only has to show me the evidence they plan to use.”
False. Since Stinchcombe, the Crown must disclose all relevant material regardless of whether it intends to rely on it, including evidence that could help the defence.
Myth: “Once I get my first disclosure package, that's everything.”
Not necessarily. Disclosure is ongoing — new material must be disclosed as it comes into existence or into the Crown's possession, sometimes well into the case.
Myth: “The Crown can get the complainant's therapy records for me automatically.”
No. Records held by third parties are not part of standard Crown disclosure and generally require a separate court application to access.
Myth: “If disclosure is late, my case gets thrown out.”
Not automatically. Courts respond to disclosure problems proportionately — adjournments and costs orders are far more common outcomes than a stay of proceedings, which is reserved for serious, prejudicial breaches.
Wondering what your disclosure package actually shows about your case? Call our Toronto criminal defence lawyers at 416-274-2222 for a free consultation.
Frequently Asked Questions
Crown disclosure is the process by which the prosecution provides the defence with all relevant material in its possession relating to the charges — including police notes, witness statements, forensic reports, and video evidence — regardless of whether the Crown intends to use that material at trial.
Yes. Under R. v. Stinchcombe, the Crown must disclose all relevant material regardless of whether it helps or hurts the prosecution's case. The obligation is not limited to evidence the Crown plans to rely on.
No. Disclosure is a continuing obligation. As new evidence, statements, or reports come into existence or into the Crown's possession, they must be disclosed to the defence, even after the case has already been proceeding for some time — and this can continue right up to and during trial.
Remedies depend on the nature and impact of the failure. Courts can order an adjournment to allow the defence time to review late material, order costs against the Crown, exclude evidence, or in serious cases involving real prejudice to the accused's right to a fair trial, stay the charges entirely.
Yes, in limited circumstances. Material protected by privilege — most notably informer identity privilege — is not disclosed. Clearly irrelevant material also falls outside the obligation. These exceptions are narrow and courts scrutinize claims of privilege carefully.
Not automatically. Records held by third parties, such as a complainant's therapy or medical records, are not in the Crown's possession or control and are not part of standard disclosure. Obtaining them generally requires a separate court application, commonly called an O'Connor application.
Generally, yes. Police officer notes documenting the investigation are a standard and important part of disclosure, and inconsistencies between an officer's notes and their later testimony can be significant in a case.
The Crown and police have a duty to preserve relevant evidence. If evidence is lost or destroyed, the defence can bring an application addressing the loss, and the court will consider factors like whether the loss was the result of unacceptable negligence and how significant the lost evidence was to the case, with remedies ranging from no consequence to a stay of proceedings in the most serious cases.
No. Reviewing full disclosure with a lawyer before making any decision about a plea is essential. Disclosure often reveals weaknesses in the Crown's case, procedural issues, or genuine defences that are not apparent from simply being told what you are charged with.
It varies significantly by the complexity of the case and the volume of evidence — straightforward matters may have most disclosure available within the first few appearances, while cases involving forensic testing, expert reports, or extensive video evidence can take considerably longer, with disclosure continuing to arrive in stages.