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Sexual Assault

Can Prior Relationships Impact Sexual Assault Cases in Calgary?

Khalid Akram · August 10, 2026 ·

Can a Prior Relationship Affect a Sexual Assault Case?

Yes. A past or ongoing relationship may help explain the circumstances surrounding an allegation. The individuals may have been married, dating, separated, living together, casually involved, or previously intimate. That history can sometimes explain why they communicated, met, travelled together, entered a residence, or remained in contact.

Relationship evidence may also help establish a timeline, identify when the relationship began or ended, explain a particular statement, or clarify why a meeting occurred. For example, a complete message thread may show that former partners arranged to meet at a certain place and time. That evidence may be relevant to chronology, but the meeting itself does not prove consent to sexual activity.

Courts admit relationship evidence only when it connects to a genuine issue at trial. It must help decide a specific point without relying on prohibited assumptions about consent or credibility.

What a Prior Relationship Does Not Prove

A previous or current relationship does not automatically prove that consent existed during the alleged incident, that consent continued from an earlier encounter, or that either person is more or less believable. It also does not make every private communication admissible or determine whether the allegation is true or false.

This rule applies to spouses, former spouses, dating partners, common-law partners, and casual partners. No relationship status creates permanent permission for sexual activity.

Why a Previous Relationship Does Not Establish Consent

Section 273.1 of the Criminal Code defines consent as the complainant’s voluntary agreement to engage in the sexual activity in question. Consent must exist when the activity takes place. Earlier intimacy, an ongoing relationship, or an agreement to meet cannot replace proof of voluntary agreement at the relevant time.

Consent on one occasion does not establish consent on another. Consent to one form of activity does not necessarily extend to another, and consent may be limited or withdrawn through words or conduct. The court must assess what was communicated before and during the specific encounter.

Dating, marriage, cohabitation, separation, or previous intimacy may explain why two people were together. It does not determine whether voluntary agreement existed. The court may consider words, conduct, surrounding circumstances, and whether agreement was freely expressed or withdrawn. Consent cannot be presumed from silence, relationship status, or sexual history.

How Section 276 Applies to Prior Relationship Evidence

Section 276 restricts the use of evidence about sexual activity that is not part of the charge. The rule applies whether the earlier activity involved the accused or another person. Evidence does not avoid section 276 merely because the complainant and accused were partners or had previously engaged in consensual activity.

The Prohibited Twin Myths

Section 276 prevents prior sexual activity from being used to support two prohibited assumptions. The first is that a complainant was more likely to consent because of previous sexual activity. The second is that a complainant is less worthy of belief because of previous sexual activity. A defence cannot rely on either form of reasoning.

The Supreme Court of Canada addressed this issue in R. v. Goldfinch. Describing prior sexual relationship evidence as general “context” is not enough. The defence must identify the precise issue the evidence helps the court decide. It cannot use relationship history indirectly to suggest likely consent or reduced credibility.

When Prior Sexual Activity Evidence May Be Admitted

Prior sexual activity evidence is not automatically excluded in every case. A judge may admit specific evidence when it serves a legitimate purpose, is relevant to an issue at trial, has significant probative value, and does not create prejudice that substantially outweighs that value.

A proper purpose may include explaining the meaning of a particular statement, addressing a material inconsistency, identifying the source of evidence, clarifying the timing of an event, or correcting a misleading impression. Broad references to a sexual relationship are unlikely to be sufficient. The application must focus on specific instances and a clearly identified issue.

Can Text Messages and Social Media Be Used as Evidence?

Texts, emails, photographs, call records, and social-media communications may be relevant in a case involving current or former partners. They can help show when a meeting was arranged, what was discussed, whether contact continued after separation, or whether an account is consistent with available records.

Sexual communications require additional caution. Section 276 includes communications made for a sexual purpose or containing sexual material. A message may therefore fall within the section even when it was sent directly between the complainant and accused. It is not automatically admissible simply because it exists or appears helpful.

Why Authenticity and Completeness Matter

The court may consider whether the sender and recipient can be identified, whether dates and timestamps are available, and whether the complete conversation has been preserved. A selected screenshot can be misleading when earlier or later messages are missing. Original devices, account records, metadata, and complete message exports may help counsel assess authenticity and context.

An accused person should avoid deleting, editing, annotating, or publicly posting potential evidence. Changes to records may create serious evidentiary concerns. Complete material should be preserved and reviewed by counsel before it is used in a police interview, court application, cross-examination, or defence strategy.

What Is the Section 276 Application Process?

The defence must generally obtain a ruling before introducing evidence governed by section 276. Counsel first identifies the specific evidence and the issue it is intended to address. A written application must provide detailed particulars and explain why the proposed use does not rely on either twin myth.

The application is ordinarily provided to the prosecutor and court clerk at least seven days before it is considered, although a judge may permit a shorter period when the interests of justice require it. The judge then decides whether the application meets the procedural requirements and whether an admissibility hearing should take place.

The jury and public are excluded from the hearing. The complainant is not required to testify but may participate, make submissions, and have a lawyer. The judge may admit all, part, or none of the proposed evidence and must explain how admitted evidence relates to an issue at trial.

What Factors Does the Judge Consider?

The judge considers the accused person’s right to make full answer and defence, the evidence’s value, the risk of discriminatory reasoning, the complainant’s dignity and privacy, and the potential for unfair prejudice.

Accurate evidence may still be inadmissible if its purpose is prohibited, its relevance is vague, it concerns broad sexual history, or its limited value is outweighed by prejudice.

How a Calgary Sexual Assault Defence Lawyer Can Help

A Calgary sexual assault defence lawyer can review disclosure, police statements, complete communications, call records, photographs, videos, timelines, location records, calendars, and potential witness information. The goal is to identify relevant evidence, preserve necessary context, and determine which evidentiary rules apply.

Counsel can also identify a legitimate purpose for proposed relationship evidence, assess whether section 276 applies, prepare the written application, respond to objections, and propose limits on how evidence should be introduced. Early review is important because the application requires detailed particulars and may need to be served before trial.

How Akram Law Can Assist

Khalid Akram can review the allegation, disclosure, communications, and relationship history to determine whether particular evidence may be relevant and admissible. Akram Law can help organize the chronology, review complete records, explain section 276, prepare required applications, and protect the accused person’s procedural and constitutional rights.

Every case depends on its facts. Counsel cannot guarantee admission or a particular result, but early advice can reduce mistakes and support the lawful presentation of relevant evidence.

Frequently Asked Questions

Does Being in a Relationship Mean Consent Is Presumed?

No. Dating, marriage, cohabitation, or previous intimacy does not create presumed or continuing consent. Voluntary agreement must exist for the specific sexual activity when it occurs.

Can Previous Consensual Activity Be Discussed at Trial?

Sometimes. The evidence must serve a specific, legitimate purpose and meet the legal requirements for admissibility. It cannot be used to suggest that earlier consent made later consent more likely or that the complainant is less credible.

What Is a Section 276 Application?

It is a written request asking the judge to determine whether specific prior sexual activity evidence may be introduced. The application must describe the evidence, identify its relevance, and explain why its proposed use is lawful.

Can Text Messages Between Former Partners Be Used?

Yes, when they are authentic, complete, relevant, and offered for a proper purpose. Sexual messages may fall under section 276, and the judge may limit which communications can be used and how they may be presented.

Why Is Early Legal Advice Important?

Early advice can help preserve complete evidence, prevent harmful alterations or public disclosures, identify application deadlines, and develop a defence strategy that complies with Canadian evidentiary law.

Expert Testimony in Sexual Assault Trials

Khalid Akram · July 26, 2026 ·

What Is Expert Testimony in a Sexual Assault Trial?

Expert testimony is opinion evidence from a person with specialized knowledge, training, education, or experience. Ordinary witnesses generally describe what they personally saw, heard, experienced, or recorded. A qualified expert may interpret technical information that falls outside the ordinary knowledge of a judge or jury.

The expert’s role is limited. The witness may explain a scientific method, medical finding, laboratory result, digital record, or recognized psychological issue. The expert does not decide whether an allegation is true, whether a witness is credible, or whether the accused is guilty. Those decisions remain with the judge or jury.

Why Expert Evidence May Be Used in Sexual Assault Cases

Sexual assault trials may involve technical evidence that requires specialized explanation. Depending on the issues, the Crown or defence may use an expert to address:

  • Medical examination findings and possible causes of injury
  • DNA collection, testing, transfer, contamination, and interpretation
  • Alcohol, medication, toxicology results, and possible effects
  • Psychological, psychiatric, cognitive, or memory-related issues
  • Digital forensics, metadata, deleted files, location data, audio, or video

Technical evidence rarely answers the entire case. A DNA match may identify a possible source but may not establish when or how material was deposited. A toxicologist may describe possible effects of a substance but may be unable to reconstruct a person’s exact condition without reliable information about dosage, timing, metabolism, food, tolerance, and testing.

When Is Expert Testimony Admissible in Canada?

The leading Canadian framework comes from R. v. Mohan. The proposed evidence must satisfy four threshold requirements: relevance, necessity in assisting the trier of fact, absence of an exclusionary rule, and a properly qualified expert.

Relevance

The opinion must relate to a material issue in the trial. It must make an important fact more or less likely or help the court understand evidence connected to a disputed issue. A technical subject is not automatically relevant merely because it appears scientific.

Necessity

The evidence must provide meaningful assistance beyond ordinary knowledge. An expert may be necessary to explain a complex DNA mixture, laboratory process, or specialized medical issue. An expert is not needed to point out ordinary inconsistencies or tell the court which witness to believe.

No Exclusionary Rule

The opinion must not violate another evidentiary rule. Expert evidence may be excluded if it improperly comments on credibility, relies on myths or stereotypes, introduces prohibited character reasoning, interprets the law, or creates unfair prejudice that outweighs its value.

Proper Qualifications

The witness must have specialized knowledge directly connected to the proposed opinion. The judge should define the area narrowly and ensure the witness stays within it throughout the testimony.

Reliability, Independence, and Scope

Reliability may depend on whether the method is recognized, the correct procedures were followed, the data is complete, the analytical steps are explained, alternative explanations were considered, and limitations or error rates were acknowledged. An opinion based on missing, inaccurate, or disputed facts may carry little weight.

Common Expert Witnesses in Sexual Assault Trials

Medical and Forensic Experts

Physicians, forensic nurses, pathologists, and laboratory specialists may explain examination findings, possible causes and timing of injuries, collection procedures, DNA results, contamination risks, or limitations in testing. A finding may be consistent with an explanation without proving it. The absence of physical findings also does not automatically prove or disprove an allegation.

Toxicology and Pharmacology Experts

These experts may discuss alcohol, medication, other substances, interactions, sample concentrations, and possible effects on physical or cognitive functioning. Their conclusions often depend on assumptions about timing, dosage, metabolism, tolerance, and testing. The defence may challenge any assumption not supported by the trial evidence.

Digital, Audio, and Video Experts

Digital forensic experts may explain device extraction, metadata, deleted information, account activity, timestamps, location data, alteration, and attribution limits. Audio or video experts may address file integrity, editing, quality, enhancement, and timestamps. A device record may show activity without proving who physically used the device.

Can an Expert Comment on Credibility?

Generally, no. Credibility belongs to the judge or jury. An expert should not state that the complainant or accused is truthful, dishonest, reliable, or unworthy of belief. The restriction also applies when the expert avoids the word “credible” but gives an opinion that has the same practical effect.

Experts must also avoid sexual assault myths and stereotypes. They should not suggest that a person must report immediately, display a particular level of emotion, end a relationship, have visible injuries, remember every detail consistently, or behave in one expected way. Specialized evidence may correct a genuine misconception, but it cannot replace case-specific analysis with another generalization.

How a Defence Lawyer Can Challenge Expert Testimony

A defence lawyer may challenge whether the expert should testify, what the expert may discuss, or how much weight the opinion deserves. Common issues include:

  • Insufficient or unrelated qualifications
  • An opinion that is irrelevant or unnecessary
  • Unreliable methodology or incomplete data
  • Unsupported factual assumptions
  • Failure to disclose uncertainty or alternative explanations
  • Bias, lack of independence, or advocacy
  • Improper comments on credibility, guilt, or legal issues
  • Opinions outside the report or recognized expertise

Voir Dire and Cross-Examination

A voir dire is a separate hearing used to decide whether disputed evidence should be admitted. Defence counsel may cross-examine the proposed expert about qualifications, methodology, assumptions, source material, independence, and scope. The judge may exclude the opinion, admit only part of it, or impose limits on its use.

At trial, cross-examination may test the expert’s instructions, records reviewed, missing information, testing procedures, quality controls, research, error rates, alternative interpretations, compensation, prior statements, and changes between the report and oral evidence. Effective questioning may show that an opinion is narrower or less certain than it first appears.

How Expert Evidence Affects Defence Strategy

The defence should assess expert evidence with witness testimony, communications, documents, forensic material, and the overall theory of the case. Counsel may ask whether the opinion addresses a genuinely disputed issue, depends on contested facts, supports more than one interpretation, or can be addressed through cross-examination without calling another expert.

The defence may consult an independent expert without calling that person as a witness. A confidential consultation can help counsel understand technical evidence, identify weaknesses, prepare questions, or determine that the Crown opinion is scientifically reasonable. A defence expert may testify when affirmative opinion evidence is necessary and strategically appropriate.

Frequently Asked Questions

When Is Expert Testimony Allowed in a Sexual Assault Trial?

It may be admitted when it is relevant, necessary, not barred by another rule, and provided by a properly qualified expert. The judge also considers reliability, prejudice, independence, and scope.

Does the Defence Need Its Own Expert?

Not always. The defence may use an expert only as a consultant to review the Crown opinion and help prepare cross-examination. Testimony may be appropriate when independent opinion evidence is required.

Can Expert Evidence Be Excluded?

Yes. A judge may exclude or limit evidence that is unnecessary, unreliable, outside the witness’s expertise, improperly directed at credibility, or more prejudicial than useful.

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Khalid Akram, a criminal defence lawyer in Calgary, offers expert representation for a range of legal issues.

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