September 13, 2025

When police seize phones, computers, or other electronic devices, the starting point is almost always a search warrant. In Canadian law, a search warrant authorizes the police to intrude on a person’s privacy and must be based on strict legal requirements. Because of the profound privacy interests in our homes and digital devices, courts have repeatedly stressed that warrants must be issued with care, based on solid grounds.
Search warrants are not merely procedural documents. They are gateways that allow the state to enter the most private aspects of a person’s life. A warrant obtained on shaky grounds risks undermining the fairness of the trial and can profoundly affect the outcome of a case. Defence counsel has several avenues to challenge the validity of a warrant and ensure that the constitutional rights of the accused are fully respected.
For a judge to authorize a search, police must present an Information to Obtain (ITO) that sets out their evidence. That evidence must show reasonable grounds to believe that an offence has been committed and that relevant evidence will be found in the place to be searched.
Reasonable grounds require more than suspicion or a gut feeling. Courts have repeatedly struck down warrants where the information in the ITO did not rise above speculation. For example, an anonymous tip with no corroboration often falls short of the standard. Similarly, reliance on assumptions without factual backing can undermine the legitimacy of the warrant.
From a defence perspective, the ITO must be scrutinized line by line. Was the tip corroborated? Were surveillance results or witness statements presented in context? Did the officer rely on generalizations about behaviour rather than concrete facts? Raising these questions can cast doubt on the legitimacy of the search and open the door to a Charter challenge.
The ITO must be complete, accurate, and balanced. This means that police are required not only to present information that supports their request but also to include facts that may undermine it. Omitting critical details or presenting evidence in a misleading way can be grounds for invalidating a warrant.
Consider a case where the police attribute illegal online activity to a particular IP address. If the officer fails to disclose that the internet connection was shared among multiple people, the judge authorizing the warrant is misled about the likelihood that the accused was responsible. Similarly, withholding uncertainties about forensic analysis, chain of custody, or witness reliability can distort the picture presented to the judge.
Defence counsel can challenge the validity of the warrant by highlighting these omissions. A search warrant built on incomplete disclosure undermines judicial oversight and can erode the fairness of the process.
Also Read: The Different Types of Warrants in Ontario
Canadian courts are cautious about “fishing expeditions” where police are given overly broad powers to search and seize. A warrant must clearly identify the place to be searched and the items to be seized. This requirement of particularity prevents law enforcement from conducting unlimited or exploratory searches.
The stakes are especially high with homes, phones, and computers. These spaces often contain vast amounts of personal information unrelated to the alleged offence. If a warrant authorizes a general search of an entire hard drive, for example, it may be challenged as unconstitutional. Defence counsel may argue that the warrant lacked sufficient specificity and violated the individual’s privacy interests.
A properly issued warrant should also specify the date, time, and exact location of its execution. If these details are missing or vague, the warrant may fail to meet the legal standard of precision.
Search warrants must be grounded in reasonably current information. Evidence that may have justified a search months earlier may no longer provide sufficient grounds if circumstances have changed.
For instance, police may rely on surveillance from many months ago to argue that drugs are stored in a particular residence. By the time the warrant is sought, however, the accused may have moved, or the alleged activity may have ceased. In such cases, the connection between the offence and the items sought becomes tenuous.
Defence lawyers can argue that the information was stale, meaning that the grounds for the warrant had effectively evaporated by the time of the application. Courts have agreed in many instances that stale evidence cannot support the intrusion into a person’s privacy.
When the validity of a search warrant is challenged, the defence may apply to cross-examine the affiant, the officer who swore the ITO. This is a powerful tool to test whether the grounds for the warrant were fairly presented.
Cross-examination can uncover whether the officer exaggerated the strength of their evidence, failed to corroborate key details, or omitted facts that may have cast doubt on the application. By probing inconsistencies or biases, defence counsel can demonstrate that the warrant should not have been issued.
This process is not automatic. Courts require the defence to show a sufficient basis for cross-examination, but when granted, it can provide a crucial opportunity to undermine the foundation of the search.
Also Read: What To Do When a Search Warrant Is Executed?
If the court finds that a search warrant was improperly issued, the consequences are significant. The search will be deemed an unreasonable search and seizure under section 8 of the Canadian Charter of Rights and Freedoms.
The next question becomes whether the evidence obtained should be excluded under section 24(2) of the Charter. Courts weigh factors such as the seriousness of the Charter breach, the impact on the accused’s rights, and the effect of excluding the evidence on the administration of justice.
For clients, the exclusion of evidence can be pivotal. Items seized from a home, vehicle, or computer often form the core of the prosecution’s case. If excluded, the Crown may be left without sufficient evidence to proceed, which can mean an acquittal.
Challenging the issuance of a search warrant is one of the most powerful strategies available to defence counsel. Because search warrants open the door to the most private areas of a person’s life, courts have imposed strict requirements on how they must be obtained and executed.
A careful review of the Information to Obtain, combined with strategic challenges based on reasonable grounds, disclosure, particularity, and the currency of the evidence, can expose weaknesses in the prosecution’s case. Where a warrant fails, Charter remedies can ensure that improperly obtained evidence is excluded.
At Fedorowicz Law, clients benefit from decades of criminal defence experience in Toronto. Richard Fedorowicz has successfully defended individuals against serious charges under the Criminal Code of Canada and the Controlled Drugs and Substances Act. By holding police to the highest legal standards, the firm ensures that privacy rights are respected and that clients receive a fair trial.
Have you or someone you know has been charged with a criminal offence? Contact Fedorowicz Law for legal advice. Richard Fedorowicz has over 20 years of experience in criminal defence and a proven track record of success. He will fully assess any elements of a criminal case that could help the most effective defence for each of his Greater Toronto Area clients.
Call Fedorowicz Law today at 249-266-4222 or fill out our convenient online form to learn how we can help you with your legal representation in Toronto!