The interview with the complainant represents the foundational evidence-gathering moment in any workplace investigation. This is the point at which the investigator receives the full narrative of alleged misconduct, establishes the factual parameters of the inquiry, and begins to assess the credibility of the account being offered. The manner in which this interview is conducted shapes everything that follows: the questions posed to the respondent, the witnesses identified for subsequent interviews, the documents requested, and ultimately the findings that emerge. A poorly conducted complainant interview can compromise an otherwise sound investigation, while a skilled interview establishes the evidentiary framework necessary for fair and defensible conclusions.
The legal foundation for complainant interviews derives from the broader duty of employers to investigate workplace complaints. Across Canadian jurisdictions, this duty emerges from multiple legislative sources operating in concert. The Occupational Health and Safety Act in Ontario, the Workers Compensation Act in British Columbia, the Occupational Health and Safety Act in Alberta, and equivalent legislation in Saskatchewan and other provinces impose obligations on employers to maintain safe workplaces and to investigate incidents that compromise worker safety. Human rights legislation at both the federal level through the Canadian Human Rights Act and provincially through statutes such as the British Columbia Human Rights Code, the Alberta Human Rights Act, the Saskatchewan Human Rights Code, and the Ontario Human Rights Code create duties to address discrimination and harassment. Quebec's Charter of Human Rights and Freedoms, which holds quasi-constitutional status within that province, imposes particularly robust obligations regarding the protection of dignity and the right to fair treatment in employment. The Canada Labour Code governs federally regulated workplaces including banks, telecommunications companies, interprovincial transportation, and federal Crown corporations, establishing its own framework for harassment prevention and investigation under Part II as of the date of authorship.
These legislative frameworks do not typically prescribe specific interview techniques, but they establish the standard against which investigations will be evaluated: reasonableness, thoroughness, and procedural fairness. When a complainant brings forward an allegation of harassment, discrimination, bullying, or other workplace misconduct, the employer's response must be proportionate to the seriousness of the complaint. This proportionality begins with the complainant interview itself. The interview must be comprehensive enough to understand the full scope of the allegations, sensitive enough to encourage forthcoming disclosure, and structured enough to produce reliable evidence that can withstand scrutiny if the matter proceeds to litigation, human rights tribunal adjudication, or grievance arbitration.
The investigator's role during the complainant interview differs fundamentally from that of an advocate or counsellor. While the investigator must treat the complainant with respect and sensitivity, the purpose of the interview is not to validate the complainant's experience or to provide emotional support. The purpose is to gather evidence systematically. This distinction matters because investigators who blur these boundaries risk compromising the neutrality that makes investigation findings credible. An investigator who appears to have prejudged the complaint in favour of the complainant will produce findings that lack persuasive force, regardless of their accuracy. The respondent, reviewing a report produced by an apparently biased investigator, will challenge the process rather than engaging with the substance of the findings. The same challenge may emerge before a human rights tribunal, a labour arbitrator, or a civil court.
Preparation before the complainant interview establishes the conditions for a productive conversation. The investigator should review all available documentation before meeting with the complainant: the written complaint if one exists, any prior correspondence or informal complaints on similar issues, relevant policies including harassment policies, codes of conduct, and complaint procedures, and any organizational context that may inform the allegations. This preparation allows the investigator to enter the interview with a preliminary understanding of the landscape while remaining genuinely open to information that contradicts or complicates that understanding. The investigator should also prepare logistical matters: a private interview location that protects confidentiality, appropriate technology if the interview will be recorded, sufficient time blocked in the schedule to avoid rushing through sensitive disclosures, and clear communication to the complainant about what to expect from the process.
The opening of the complainant interview sets the tone for everything that follows. The investigator should explain their role clearly, emphasizing their independence and their mandate to gather facts rather than to advocate for any party. The scope of confidentiality must be addressed honestly. Many complainants expect or hope that their identity will be protected, but this is rarely possible in a procedurally fair investigation. The respondent has a right to know the specific allegations against them and, in most cases, will be able to identify the complainant from the nature of the allegations themselves. The investigator should explain that information will be shared on a need-to-know basis, that the investigation will be conducted with discretion, but that complete confidentiality cannot be guaranteed. False assurances of confidentiality at this stage create serious problems later when the complainant discovers that their account has been disclosed to the respondent or to witnesses.
The investigator should also explain the prohibition on retaliation. Employment standards legislation, human rights codes, and occupational health and safety statutes across Canadian jurisdictions prohibit reprisal against employees who participate in good faith in workplace investigations. The complainant should understand that they are protected from adverse treatment as a consequence of bringing forward their complaint, and that any concerns about retaliation should be reported immediately. This explanation serves both legal compliance and practical purposes: a complainant who feels protected is more likely to provide complete and accurate information.
Obtaining the complainant's narrative requires patience and skill. The most effective approach typically begins with open-ended questions that allow the complainant to describe events in their own words without interruption. Questions such as "Can you tell me what happened?" or "Can you describe the situation that led you to bring this complaint?" invite narrative responses that reveal not only facts but also the complainant's perspective, their emphasis, and their emotional response to events. The investigator should resist the impulse to interrupt with clarifying questions during this initial narrative phase. Let the complainant speak. Take notes. Allow silences. The initial narrative often contains the most valuable information because it reflects what the complainant considers most important and most troubling.
Following the initial narrative, the investigator moves to more detailed questioning. This phase requires the investigator to probe gaps in the narrative, clarify ambiguities, establish timelines, and test the internal consistency of the account. Questions should be specific without being leading. Instead of asking "Did he make you uncomfortable when he touched your shoulder?" the investigator might ask "You mentioned that he touched your shoulder. Can you describe what happened next?" or "How did you respond to that?" These questions seek information without suggesting the answer the investigator expects to receive.
Establishing a precise timeline is essential for effective investigation. The investigator should work with the complainant to identify specific dates whenever possible, or at minimum to establish the sequence of events and the approximate timing. Questions such as "When did this first occur?" or "How long after the first incident did the second incident take place?" help construct a chronological framework. Documentary evidence often assists with timeline construction: the complainant may have sent emails, text messages, or made calendar entries that anchor events to specific dates. The investigator should ask about such documentation and request copies.
Identifying witnesses represents a critical function of the complainant interview. The investigator should ask directly who else may have observed the alleged conduct, who the complainant spoke to about it, and who else might have relevant information. The complainant may not immediately think of all potential witnesses, so the investigator should probe systematically: "Who else was in the room when this happened?" "Did you tell anyone about this at the time?" "Has anyone else mentioned similar experiences?" "Who else works closely with the respondent who might have observed their behaviour?" The witness list generated from the complainant interview becomes the starting point for the investigator's subsequent evidence gathering, though it will typically expand as the investigation proceeds.
Documentation identified during the complainant interview often proves crucial to investigation outcomes. The investigator should ask whether the complainant has any documents, emails, text messages, photographs, recordings, or other materials that relate to the allegations. Performance reviews, written complaints, contemporaneous notes, and similar documents may corroborate the complainant's account or provide context for alleged events. The investigator should request copies of all relevant materials and should make notes about documents that the complainant references but does not have in their possession.
The scope of the investigation is defined substantially through the complainant interview. The investigator must understand exactly what conduct is being alleged, over what time period, involving which individuals. Vague or shifting allegations create serious problems for fair investigation. The respondent has a right to know the specific allegations against them, and the investigator must be able to articulate those allegations with precision. If the complainant makes sweeping statements such as "he's always harassing everyone," the investigator must probe for specifics: "Can you give me a specific example?" "When did this occur?" "Who else was present?" Allegations that cannot be reduced to specific, investigable facts may need to be excluded from the investigation scope or addressed separately.
Consider a situation that arose in a healthcare organization in Calgary. A registered nurse named Patricia Lowry brought forward a complaint against her supervisor, Mitchell Okonkwo, alleging that he had created a hostile work environment through repeated intimidating behaviour over a period of approximately eight months. Patricia submitted a brief written complaint stating that Mitchell "constantly belittled her in front of patients and colleagues" and that she "felt unsafe coming to work." The organization retained an external investigator, Carla Dimitriou, to conduct an investigation.
Carla's complainant interview with Patricia took place on March 3, 2026 at 1:30 p.m. in a private conference room at the organization's administrative offices. The interview lasted approximately three hours with one brief break. Carla began by explaining her role as an independent investigator, outlining the investigation process, discussing the limits of confidentiality, and confirming that Patricia understood her rights regarding retaliation protection.
When invited to describe what had happened, Patricia provided an initial narrative that was emotional and somewhat disorganized. She described feeling "constantly undermined" and "made to feel incompetent" but initially struggled to identify specific incidents. Carla listened without interruption, taking detailed notes, and waited for Patricia to indicate that she had finished her initial account.
Carla then began the detailed questioning phase by asking Patricia to identify the first incident she could recall that contributed to her complaint. Patricia described a morning in early July 2025 when Mitchell had criticized her patient charting in front of two other nurses, stating that her documentation was "sloppy" and "unacceptable" in a tone Patricia described as "loud and aggressive." Carla asked follow-up questions: What exactly did Mitchell say? Where did this occur? What time of day? Who else was present? How did Patricia respond? What happened next? Through this detailed questioning, Carla established that the incident occurred in the nursing station on the fourth floor, that the two other nurses present were Deepa Sharma and François Bergeron, that Patricia had not responded verbally but had felt "humiliated and close to tears," and that she had documented the incident in a personal journal she kept at home.
Carla then asked Patricia to identify additional incidents. Over the course of the interview, Patricia described eleven separate incidents spanning from July 2025 to February 2026. Some incidents were described in detail with specific dates and witnesses; others were described more vaguely. Carla noted which allegations required further clarification and which were sufficiently specific to form the basis for investigation.
For each incident, Carla asked Patricia to identify any witnesses and any documentary evidence. Patricia identified seven potential witnesses including the two nurses present at the first incident, a patient care aide who allegedly witnessed Mitchell slamming a door and swearing, a charge nurse to whom Patricia had reported concerns informally, and Patricia's union representative with whom she had discussed the situation. Patricia also identified several types of documentary evidence: her personal journal entries, a series of text messages to her spouse describing incidents as they occurred, and an email she had sent to the charge nurse on October 17, 2025 describing her concerns.
Carla asked Patricia whether anyone else had reported similar concerns about Mitchell's behaviour. Patricia stated that she believed Deepa Sharma had also experienced intimidating behaviour but was afraid to come forward. Carla noted this information while explaining that she could not compel anyone to participate in the investigation and that she would approach potential witnesses in a manner that protected their ability to participate voluntarily.
Near the end of the interview, Carla summarized the specific allegations she had identified and asked Patricia to confirm that this summary accurately reflected her complaint. The allegations included: verbal criticism of Patricia's work delivered in an aggressive tone in front of colleagues on at least five specific occasions; physical behaviours such as door-slamming and finger-pointing that Patricia perceived as intimidating on at least three occasions; exclusion from team meetings and professional development opportunities on at least two occasions; and a comment Mitchell allegedly made on January 8, 2026 stating that Patricia was "not cut out for this unit" and should "consider whether nursing was the right career" for her.
Patricia confirmed the accuracy of this summary and added one incident she had forgotten to mention: a situation on December 12, 2025 when Mitchell allegedly assigned her the most difficult patient load while giving lighter assignments to nurses he favoured. Carla added this to the allegation list and asked clarifying questions about the specifics.
Before concluding the interview, Carla asked Patricia several additional questions. She asked whether Patricia had any concerns about participating in the investigation or any fears about potential retaliation. Patricia expressed concern that Mitchell would "make her life even more difficult" if he learned she had complained. Carla explained the organization's retaliation policy and encouraged Patricia to report any concerning behaviour immediately. Carla also asked whether Patricia had any expectations about the investigation outcome. Patricia stated that she wanted the behaviour to stop and wanted to feel safe at work; she was not seeking Mitchell's termination.
Carla concluded the interview by explaining the next steps in the process: she would be interviewing Mitchell, interviewing witnesses, reviewing documents, and ultimately preparing a report with findings. She explained that the process would take several weeks and that Patricia should contact her if she remembered additional information or if any new incidents occurred. Carla provided Patricia with contact information and reminded her of the importance of maintaining confidentiality about the investigation.
Following the interview, Carla prepared detailed notes while the conversation was fresh in her memory. Her notes documented not only the substance of Patricia's allegations but also her observations about Patricia's demeanor, her responsiveness to questions, and the consistency of her account. Carla noted areas where Patricia's account had been detailed and specific and areas where it had been vague or where Patricia had acknowledged uncertainty. These observations would inform Carla's credibility assessment later in the process.
The Patricia Lowry investigation illustrates several implications for effective complainant interviewing. The investigator's patience during the initial narrative allowed Patricia to tell her story in her own way, establishing rapport and demonstrating respect. The systematic follow-up questioning transformed a general complaint about hostile work environment into a list of specific, investigable allegations. The identification of witnesses and documents created a roadmap for subsequent evidence gathering. The summary and confirmation at the end of the interview ensured that both the investigator and the complainant shared an understanding of the allegations being investigated.
The implications of a poorly conducted complainant interview can be severe. An investigator who fails to probe for specifics may find themselves investigating vague allegations that cannot be substantiated or refuted. An investigator who leads the complainant toward particular answers may produce findings that do not withstand scrutiny. An investigator who fails to identify witnesses and documents during the complainant interview may miss crucial evidence. An investigator who provides false assurances about confidentiality may damage trust in the entire process when those assurances prove impossible to honour.
Documentation of the complainant interview serves multiple purposes. The investigator's notes become part of the evidentiary record and may be reviewed by decision-makers, by the parties, by union representatives, by legal counsel, and potentially by adjudicators if the matter proceeds beyond the workplace. Thorough documentation protects the integrity of the process by creating a contemporaneous record of what was said. It also protects the investigator against later claims of bias or impropriety. If a complainant later asserts that the investigator promised a particular outcome or failed to ask about relevant matters, the interview notes provide a record of what actually occurred.
Some investigators audio or video record complainant interviews. This practice has advantages and disadvantages. Recording creates an unimpeachable record of the interview and frees the investigator to focus on the conversation rather than on note-taking. However, recording may make complainants more guarded in their responses and may create obligations regarding document retention and disclosure. If recording is contemplated, the investigator should confirm that recording is permissible under applicable privacy legislation, should obtain the complainant's consent, and should explain how the recording will be used and retained. In Quebec, the Civil Code of Quebec provisions regarding privacy must be considered alongside the Charter of Human Rights and Freedoms when determining whether recording is appropriate and what consent is required.
Following the complainant interview, the investigator should take several concrete steps. First, the investigator should finalize the list of specific allegations that will form the scope of the investigation. This list should be precise enough to be shared with the respondent and to guide subsequent interviews. Second, the investigator should create a witness list based on information provided by the complainant, recognizing that this list will likely expand as the investigation proceeds. Third, the investigator should request copies of any documents the complainant identified during the interview and should note any documents that need to be requested from the organization. Fourth, the investigator should consider whether any interim measures are necessary pending the completion of the investigation, such as separating the complainant and respondent, modifying reporting relationships, or implementing supervision arrangements. Fifth, the investigator should communicate with the organization's designated contact person regarding the scope of the investigation, the anticipated timeline, and any immediate concerns.
The complainant interview is not typically a single event. In complex investigations, the investigator may need to return to the complainant with follow-up questions as new information emerges from other interviews or documents. The investigator should advise the complainant of this possibility at the outset and should maintain an open channel for communication throughout the investigation. If the complainant contacts the investigator with additional information, the investigator should document that communication thoroughly.
Throughout the complainant interview and the subsequent investigation, the investigator must remain alert to their own biases and assumptions. It is natural to feel sympathy for a complainant who describes distressing experiences. It is equally natural to form preliminary impressions about whether the complaint is well-founded. The skilled investigator acknowledges these reactions while consciously maintaining neutrality. The investigator's role is to gather evidence and assess it fairly, not to champion the complainant's cause or to protect the respondent from accountability.
Questions that investigators should ask themselves following a complainant interview include: Have I identified all the specific allegations with sufficient precision to investigate them? Have I identified all potential witnesses? Have I identified all relevant documents? Do I understand the timeline of events? Are there gaps or inconsistencies in the complainant's account that require clarification? Have I made any promises regarding confidentiality or outcomes that I may not be able to keep? Have I documented the interview thoroughly enough that another investigator could understand exactly what was said?
The documentation created during and following the complainant interview should include comprehensive notes of the conversation, a clear list of specific allegations, a list of witnesses to be interviewed with contact information where available, a list of documents to be obtained, any observations relevant to credibility assessment, and notes regarding the complainant's demeanor, responsiveness, and concerns. This documentation becomes the foundation for everything that follows in the investigation.
Effective complainant interviewing is both a technical skill and an interpersonal one. The technical dimensions involve knowing what questions to ask, how to document responses, and how to structure the scope of an investigation. The interpersonal dimensions involve creating conditions in which a complainant feels heard and respected while maintaining the neutrality essential to fair process. Investigators who master both dimensions conduct investigations that produce reliable findings and withstand scrutiny from all quarters.