- Section 9 of the Charter protects you from arbitrary detention — police need a genuine, articulable legal basis before they can detain you.
- Section 10(a) requires police to tell you promptly why you are being detained or arrested, in terms you can actually understand.
- Section 10(b) guarantees the right to retain and instruct counsel without delay, and imposes both an informational duty (telling you about the right, and about duty counsel) and an implementational duty (giving you a real opportunity to call a lawyer and holding off on questioning while you do).
- Section 7 protects your right to remain silent — you are never legally obligated to answer police questions about the offence, even after being told what you are charged with.
- Section 8 protects you from unreasonable search and seizure, and often overlaps with what happens during an arrest.
- If police violate your Charter rights, the evidence obtained can potentially be excluded under section 24(2) — a genuine, case-altering remedy, not a technicality.
The Short Answer
The moment you are detained or arrested in Ontario, a specific set of constitutional protections under the Canadian Charter of Rights and Freedoms switches on. You have the right not to be arbitrarily detained, the right to be told promptly why, the right to speak to a lawyer without delay, and the right to remain silent. Police are legally required to respect all of these — and when they don't, there can be real consequences for the case against you.
Section 9: No Arbitrary Detention
Section 9 of the Charter states that everyone has the right not to be arbitrarily detained or imprisoned. In practice, this means police need a genuine, articulable legal basis before they can detain you — a hunch, a vague suspicion, or someone's general appearance is not enough. A lawful detention generally requires reasonable grounds to suspect involvement in a specific offence, or another recognized legal basis, such as a lawful arrest.
Detention is not limited to being physically restrained or placed in a cruiser. It can also occur through a psychological restraint — where a reasonable person in your circumstances would believe they had no choice but to comply with police direction, even without being physically touched.
“Detention” vs. a Casual Conversation
Not every interaction with police is a detention. Officers are free to approach people in public and ask general questions, and you are generally free to decline to engage and walk away, provided you are not otherwise being lawfully detained. The legal line is drawn by asking whether a reasonable person in your position would have felt free to leave or to decline to answer. If the answer is no — because of physical restraint, a command, or the overall tone and circumstances of the encounter — a detention has likely occurred, and your section 9 and section 10 rights are engaged.
An officer asks someone standing near a store, “Can I ask you a few questions?” The person is free to say no and walk away — this is not yet a detention. If the officer instead says, “Stay right there, don't move,” or physically blocks the person's path while asking pointed questions about a specific offence, the encounter has likely become a detention, triggering Charter protections.
Section 10(a): The Right to Know Why
Section 10(a) requires that anyone who is arrested or detained be informed promptly of the reasons for it. This is not satisfied by a vague statement like “you're under investigation” — the explanation must be specific enough, in language you can reasonably understand, for you to know the extent of your legal jeopardy. This matters practically: you cannot meaningfully decide whether to submit to an arrest, or properly instruct a lawyer under section 10(b), if you don't actually know what you're being accused of.
Section 10(b): The Right to Retain and Instruct Counsel
Section 10(b) guarantees the right, on arrest or detention, to retain and instruct counsel without delay, and to be informed of that right. Courts have interpreted this as imposing two distinct duties on police:
| Duty | What It Requires |
|---|---|
| Informational duty | Police must tell you, immediately upon detention or arrest, that you have the right to retain and instruct counsel without delay, and that free, immediate legal advice is available through duty counsel regardless of your financial situation |
| Implementational duty | If you indicate you want to exercise that right, police must give you a genuine, reasonable opportunity to contact a lawyer — including access to a phone and privacy — and must hold off on questioning you or otherwise trying to obtain evidence from you until you have had that opportunity |
This framework means the right to counsel is not satisfied by simply reciting a line from a card. Police have an active obligation to facilitate real access to legal advice, and to pause their investigation while you exercise it. If you ask for a lawyer and police continue pressing you with questions in the meantime, that can itself constitute a breach.
You do not need to already have a lawyer, or be able to afford one, to exercise your right to counsel at the police station. Duty counsel provides free, immediate legal advice by phone to anyone in custody, and police are required to help you reach that service.
Section 7: The Right to Silence
Section 7 of the Charter protects the right to life, liberty, and security of the person, and Canadian courts have long recognized that this includes a right to silence and protection against self-incrimination. In practical terms, this means you are never legally obligated to answer police questions about the alleged offence — not at the roadside, not at the station, and not even after you have been told exactly what you are charged with under section 10(a). You can simply state that you wish to remain silent and want to speak to a lawyer, and stop talking from that point forward.
A common misunderstanding is that once you know the charge, you should explain yourself. Legally, nothing changes — your right to silence continues throughout the investigation, the interview, and beyond. There is no legal obligation to give police your version of events at any stage.
Section 8: Search and Seizure, Briefly
Section 8 protects everyone from unreasonable search and seizure, and it frequently overlaps with what happens during and after an arrest — police may search a person and their immediate surroundings incident to a lawful arrest, but broader searches of a vehicle, home, or phone generally require separate legal authority. Because search and seizure raises its own detailed set of rules, we cover it in depth separately.
See our guide on when police can search you without a warrant, and our separate guide on cell phone searches, for the full picture.
What Police Can and Cannot Do
| Police Can | Police Cannot |
|---|---|
| Approach you and ask questions in a public place | Detain you without a genuine, articulable legal basis |
| Detain you briefly on reasonable suspicion connected to a specific offence | Continue questioning you after you clearly ask for a lawyer, before you have had a reasonable chance to speak with one |
| Arrest you where they have reasonable and probable grounds | Withhold or delay telling you promptly why you are being detained or arrested |
| Search you and your immediate surroundings incident to a lawful arrest | Treat your silence as an admission of guilt or use it against you |
| Tell you about duty counsel and help you contact a lawyer | Search your home, vehicle trunk, or phone without proper legal authority, absent a recognized exception |
Why Talking to Police Rarely Helps
It is a natural instinct to want to explain yourself, especially if you believe you have done nothing wrong. In practice, this instinct rarely helps and can genuinely hurt. Statements made under stress, without legal advice, are easily misunderstood, taken out of context, or used to fill gaps in an otherwise incomplete case. Even a truthful, well-intentioned explanation can be twisted into something that looks inconsistent later, once more facts emerge. A brief conversation with a lawyer — often available immediately and at no cost through duty counsel — costs you nothing and can meaningfully change how the rest of the process unfolds.
- You cannot “talk your way out” of an investigation — that decision belongs to the Crown and the courts, not to how convincing you sound in an interview room.
- Anything you say can be used as evidence, including small inconsistencies that seem irrelevant to you in the moment.
- Police are legally permitted to use investigative techniques during questioning that are designed to elicit information, even from people who intend to say very little.
The Remedy: Excluding Evidence Under Section 24(2)
When police violate a Charter right — for example, by continuing to question someone after they asked for a lawyer, or by detaining someone without a lawful basis — the consequence is not that the charges automatically disappear. Instead, the relevant remedy is usually found in section 24(2) of the Charter, which allows a court to exclude evidence obtained in a manner that infringed a Charter right, where admitting it would bring the administration of justice into disrepute.
Courts assess this using a framework that weighs three broad considerations, generally without applying any one of them mechanically:
How deliberate, reckless, or egregious was the police conduct that caused the breach? A good-faith, technical error is treated differently than a wilful or flagrant disregard for someone's rights.
How seriously did the breach actually affect the person's protected interests — their liberty, their right to counsel, their bodily integrity, or their privacy?
What is the effect of excluding (or including) the evidence on the truth-seeking function of the trial, including the reliability of the evidence itself?
A court weighs all three considerations together — exclusion is not automatic just because a breach occurred, but it is also a real and meaningful remedy, not a mere technicality. In cases where the breach is serious and the evidence is central to the Crown's case, exclusion can end a prosecution entirely.
What to Do If You Think Your Rights Were Breached
If you believe your Charter rights were violated during an arrest or detention, the most useful thing you can do is preserve the details while they are fresh — what officers said, what you said, what time things happened, and whether you asked for a lawyer and what response you got. Do not attempt to relitigate the issue with police in the moment; raising a Charter argument is a legal process handled through your lawyer and the courts, not something to argue about at the roadside or in the interview room.
Common Myths
Myth: “If I didn't do anything wrong, I don't need to worry about my rights.”
False. Charter rights protect everyone equally, regardless of guilt or innocence, and exercising them is never evidence of wrongdoing.
Myth: “Police have to let me go if they don't read me my rights perfectly.”
Not quite. There is no fixed script that must be recited word-for-word — what matters is whether the substance of the informational and implementational duties was actually met. Minor wording differences don't automatically create a breach, but a genuine failure to inform or facilitate access to counsel can.
Myth: “Staying silent will make me look guilty in court.”
False. The right to silence is constitutionally protected, and exercising it cannot be used as evidence against you.
Concerned your rights were violated during an arrest or detention? Call our Toronto criminal defence lawyers at 416-274-2222 for a free consultation.
Frequently Asked Questions
The core protections are section 9 (no arbitrary detention), section 10(a) (right to be told promptly why you are detained or arrested), section 10(b) (right to retain and instruct counsel without delay), section 7 (right to silence and protection against self-incrimination), and section 8 (protection against unreasonable search and seizure). Together, they govern almost everything that happens in the first hours after police involvement.
Yes. Section 10(a) requires police to inform you promptly of the reasons for your detention or arrest, in language you can reasonably understand. This is not a formality — it is what allows you to make an informed decision about whether to submit to the arrest and to meaningfully instruct a lawyer.
No. Section 7 of the Charter protects your right to remain silent at every stage, whether or not you have been formally charged. You are not legally required to answer questions about the alleged offence, and you can state clearly that you wish to remain silent and speak to a lawyer.
A casual conversation with police is not a detention — you remain free to leave. A detention occurs when police assume control over your movement through a legal or physical restraint, or where a reasonable person in your position would conclude they were not free to leave and had to comply. Once detained, your section 9 and section 10 rights are engaged.
Once you indicate you want to speak to a lawyer, police have an implementational duty under section 10(b) to give you a reasonable opportunity to do so and to hold off on questioning or attempting to elicit evidence until you have had that chance. Continuing to question you in the interim can itself amount to a Charter breach.
You have the right to call duty counsel, a lawyer who provides free, immediate legal advice by phone, regardless of income, and police are required to tell you this service exists and to facilitate your access to it. Duty counsel is not the same as retaining your own lawyer for the case going forward, but it ensures you are not left without any legal guidance at the critical early stage.
Yes, potentially. Under section 24(2) of the Charter, a court can exclude evidence obtained in a way that breached your rights if admitting it would bring the administration of justice into disrepute. Courts weigh the seriousness of the breach, its impact on your Charter-protected interests, and society's interest in a trial decided on its merits.
Generally, no. Even innocent explanations can be misunderstood, taken out of context, or used to fill gaps in the Crown's case. Speaking to a lawyer first, even briefly, costs you nothing and can meaningfully protect you — this is exactly why the right to counsel exists.
No, and the law is built around that principle. Exercising your right to silence cannot be used as evidence of guilt. It is a constitutionally protected choice, not an admission of anything.
Note everything you can remember as soon as possible — what was said, what happened, and when — and speak to a criminal defence lawyer promptly. Whether a breach occurred, and whether it affects your case, requires a careful legal analysis of the specific facts and is best assessed early.