Understanding Charter Challenges in Calgary’s Criminal Justice System
A Charter breach can dramatically affect how a criminal case unfolds. If the court finds that the police violated the accused’s rights, critical evidence – such as breath samples, statements, or seized items – may be excluded. In some situations, this can result in reduced charges or even a complete dismissal, making Charter challenges a powerful defence tool in Calgary’s justice system.
Key Points Calgary Defence Lawyers Consider
Overview of how Calgary police actions may trigger Charter breaches:
Defence lawyers review CPS actions such as vehicle stops without reasonable grounds, roadside detentions that last too long, warrantless home entries, or searches conducted without proper justification. Any deviation from lawful procedure can open the door to a Charter challenge.
Common Charter sections relevant to Calgary cases (ss. 7, 8, 9, 10(b)):
- Section 7: Right to life, liberty, and security of the person
- Section 8: Right to be free from unreasonable search and seizure
- Section 9: Protection against arbitrary detention
- Section 10(b): Right to speak to a lawyer without delay
Importance of documenting interactions with Calgary Police Service (CPS):
Defence lawyers rely on police notes, body-worn camera footage, dash-cam recordings, radio logs, and witness statements. In Calgary, many Charter challenges hinge on whether the CPS officer properly explained rights to counsel or had lawful grounds for a detention or search.
Why Charter rulings can significantly change the outcome of a case:
If the Alberta Court of Justice or the Court of King’s Bench finds that a Charter violation occurred, the judge may exclude essential prosecution evidence under s. 24(2). This can weaken the Crown’s case substantially, especially in DUI, assault, drug, and weapons matters. As a result, a successful Charter challenge can lead to reduced penalties or the charges being withdrawn completely.
Identifying Potential Charter Violations in Calgary Arrests
- Reviewing the lawfulness of traffic stops by CPS:
Defence lawyers assess whether CPS had reasonable suspicion or lawful authority to stop the vehicle. Unjustified stops – often seen during large-scale impaired-driving operations in Calgary – can violate fundamental rights and undermine the Crown’s case. - Examining whether detention was arbitrary (s. 9):
Section 9 protects individuals from being detained without lawful justification. In Calgary, issues commonly arise when police prolong roadside detentions, conduct unnecessary questioning, or fail to clearly communicate that the individual is being detained. - Assessing the legality of search and seizure under s. 8:
Calgary police often conduct searches during drug investigations, domestic calls, or after traffic stops. Defence lawyers look closely at whether CPS had a warrant, valid consent, or reasonable grounds. Any evidence obtained through an unlawful search may be excluded. - Evaluating delayed access to counsel under s. 10(b):
Section 10(b) requires police to inform the accused of their right to speak with a lawyer and provide immediate access to counsel. Delays in facilitating a phone call, failing to provide privacy, or offering incomplete information are common grounds for Charter challenges in Calgary. - Identifying Charter issues common in Calgary DUI, assault, and drug cases:
Charter violations frequently occur in impaired-driving stops (breath test delays, unlawful demands), downtown assault arrests (failures to properly inform of rights), and drug cases (unreasonable vehicle searches or warrantless home entries). These Calgary-specific patterns help defence lawyers anticipate where a case may contain constitutional weaknesses.
Gathering Evidence and Building the Factual Record
A defence lawyer cannot succeed in a Charter challenge without a comprehensive and well-documented factual record. The factual record becomes the backbone of the Charter application, allowing the lawyer to show precisely how the Calgary Police Service (CPS) may have breached the accused’s constitutional rights.
Key Steps Defence Lawyers Take to Build the Factual Record
- Requesting full disclosure from Calgary Crown Prosecutors:
Defence counsel submits formal requests for complete disclosure, including officer notes, reports, breathalyzer records, investigative materials, and any supplementary documentation held by the Calgary Crown Prosecutors’ Office. In Charter matters, missing disclosure can itself become a rights issue. - Obtaining CPS body-worn camera and In-Car Digital Video (ICDV) footage:
Calgary Police Service officers regularly use body-worn cameras and ICDV units in patrol vehicles. These recordings are often crucial for determining whether officers complied with Charter requirements – especially during roadside stops and arrests in areas like Deerfoot Trail, Downtown Calgary, and the Beltline. - Interviewing witnesses and gathering third-party records:
Defence lawyers speak with bystanders, passengers, neighbours, business owners, and anyone present during the police interaction. They may also request third-party records such as 911 call logs, private CCTV footage, building entry logs, or bar security videos from popular Calgary nightlife districts. - Filing preservation requests for time-sensitive video evidence:
Many surveillance systems automatically overwrite footage within days or weeks. Defence lawyers send preservation letters to businesses, residential buildings, Calgary Transit, and other entities to ensure relevant footage is saved before it is lost. - Analysing police procedure compliance specific to Calgary CPS policies:
CPS has detailed operational policies governing detentions, roadside breath demands, use of force, and search-and-seizure procedures. Defence lawyers compare officer conduct to these internal CPS policies, as inconsistencies can strengthen a Charter argument and reveal breaches of standard protocol.
Legal Research and Developing the Charter Argument
- Reviewing Alberta precedents shaping local Charter rulings:
Defence lawyers study decisions from Calgary and Edmonton courts, focusing on how Alberta judges evaluate detention delays, unlawful searches, right-to-counsel issues, and roadside investigative practices. These local precedents help predict how Calgary judges may view similar police conduct. - Applying Supreme Court of Canada principles like R v. Grant:
Grant remains the leading authority on determining whether evidence should be excluded under s. 24(2). Defence lawyers apply the Grant factors – seriousness of the Charter breach, impact on the accused’s rights, and society’s interest in a trial on the merits – to show why exclusion is justified. - Identifying procedural errors by Calgary Police Service:
The lawyer examines gaps between CPS actions and constitutional requirements. Common examples include failures to articulate grounds for detention, delays in providing access to counsel, or searches conducted without proper legal authority. These procedural missteps often form the backbone of a Charter application. - Drafting the constitutional argument based on legal tests:
Using Alberta and national case law, the lawyer drafts a structured argument demonstrating how the police conduct violated constitutional standards. This may involve applying tests for arbitrary detention, reasonable grounds for search, or timeliness of access to counsel. - Considering remedies: exclusion of evidence vs. stay of charges:
The lawyer assesses which remedy best fits the breach.- Exclusion of evidence (s. 24(2)) is common in Calgary DUI, drug, and search-related cases.
- A stay of proceedings (s. 24(1)) may be sought in more serious or systemic violations where the fairness of the trial is irreparably compromised.
Filing the Charter Application in Calgary Court
- Mandatory filing timelines under Alberta criminal procedure:
Alberta law requires Charter applications to be filed well in advance of trial, often weeks or months beforehand depending on the complexity of the case. Missing these deadlines may result in the application being dismissed or adjourned. - Preparing Affidavits outlining facts supporting the Charter breach:
Defence lawyers draft sworn affidavits that detail the accused’s version of events, referencing the evidence gathered from CPS footage, witness statements, and documents. These affidavits provide the factual foundation for the Charter argument. - Serving the Crown Prosecutor with notice of application:
The Crown must be formally served with the Charter Notice and all supporting materials. This ensures Crown Prosecutors in Calgary have enough time to prepare a response and provides transparency prior to the voir dire. - Requesting voir dire (a separate hearing) to determine admissibility:
A voir dire allows the court to hear evidence and arguments related solely to the Charter issue. The judge will decide whether the evidence was obtained constitutionally and whether it should be excluded under s. 24(2). - Coordinating with Calgary court scheduling for Charter hearings:
Defence counsel works with court clerks at the Calgary Courts Centre to secure available dates for the voir dire. Because Calgary’s court system is busy, scheduling can be complex, particularly for multi-day hearings involving multiple witnesses, specialists, or CPS officers.
Presenting the Charter Challenge Before a Calgary Judge
- Cross-examining CPS officers on arrest procedures:
Defence counsel questions CPS officers about their grounds for detention, the steps they took during the arrest, their understanding of Charter obligations, and any inconsistencies in their notes or testimony. Even small errors can significantly strengthen the Charter argument. - Using video evidence to prove rights violations:
Calgary’s widespread use of body-worn cameras and In-Car Digital Video (ICDV) systems allows defence lawyers to present real-time visual evidence. Video often reveals tone, timing, officer conduct, and procedural lapses that written notes may omit. - Arguing the impact of the breach on the accused’s liberty and privacy:
Defence lawyers demonstrate how the rights violation affected the accused – whether through an unlawful detention, an intrusive search, delayed access to counsel, or coercive questioning. These impacts are central to the court’s Charter analysis. - Demonstrating the seriousness of police misconduct:
The defence highlights whether CPS officers ignored legal requirements, acted without reasonable grounds, or engaged in conduct that undermines public confidence in the justice system. Serious or deliberate misconduct weighs heavily in favour of excluding evidence. - Applying the R v. Grant factors to Calgary-specific scenarios:
Defence lawyers guide the judge through the Grant test, explaining:- the seriousness of the Charter breach,
- the impact on the accused’s rights, and
- society’s interest in adjudicating the case on its merits.
How a Successful Charter Challenge Can Impact a Calgary Case
- Excluding breathalyzer results in Calgary impaired driving cases:
Many DUI cases hinge on breath test readings. If CPS officers delay access to counsel, improperly administer tests, or unlawfully detain a driver, the breathalyzer results may be excluded – often leading to the charges being dropped. - Suppressing drugs found during unlawful searches:
When CPS conducts a vehicle search, bag search, or home search without proper legal grounds, the defence may argue that the drugs were obtained through a Charter breach. Without the seized substances, the Crown may have no viable case. - Dismissing charges when police violate right-to-counsel rules:
Section 10(b) violations – especially delayed or incomplete access to a lawyer – are frequently litigated in Calgary. If the breach affected the accused’s ability to make informed decisions, the court may exclude evidence or dismiss the case. - Reduced penalties or complete stays of proceedings:
If evidence is compromised, the Crown may offer reduced charges or agree to a lesser sentence. In cases involving serious breaches, the court may stay the proceedings entirely, ending the prosecution. - Why Charter challenges are a cornerstone of criminal defence in Calgary:
Charter litigation ensures accountability within the Calgary Police Service and protects the fairness of the justice system. For defence lawyers, Charter challenges are essential tools for safeguarding individual rights and ensuring that police follow lawful procedures.

