Workplace investigations depend entirely on the quality of information gathered from the individuals who witnessed, experienced, or have knowledge of the events in question. The interview process forms the evidentiary backbone of any investigation, and the manner in which an investigator manages these conversations determines whether the final conclusions will withstand scrutiny. Two interrelated challenges dominate this process: maintaining appropriate scope so that interviews remain focused and productive, and preserving confidentiality to protect the integrity of the investigation while respecting the privacy interests of all parties involved. These considerations are not merely procedural preferences but reflect legal obligations arising from multiple statutory frameworks across Canadian jurisdictions, as well as principles of procedural fairness that courts and tribunals have consistently required employers to observe.
The legal foundation for conducting proper witness interviews draws from several sources. Human rights legislation across Canada, including the Canadian Human Rights Act at the federal level and provincial statutes such as the Ontario Human Rights Code, the British Columbia Human Rights Code, the Alberta Human Rights Act, the Saskatchewan Human Rights Code, and Quebec's Charter of Human Rights and Freedoms, creates obligations for employers to investigate complaints of discrimination and harassment. These statutes, as of the date of authorship, require employers to take complaints seriously and to conduct investigations that are thorough enough to determine what occurred and whether corrective action is warranted. Occupational health and safety legislation similarly imposes investigative duties, particularly with respect to workplace violence and harassment. The Canada Labour Code Part II applies to federally regulated employers and includes specific requirements for investigating complaints of harassment and violence, while provincial legislation such as Ontario's Occupational Health and Safety Act, British Columbia's Workers Compensation Act and its associated regulations, Alberta's Occupational Health and Safety Act, Saskatchewan's Saskatchewan Employment Act Part III, and Quebec's Act Respecting Occupational Health and Safety establishes parallel obligations for provincially regulated workplaces. Privacy legislation adds another layer of complexity, as the Personal Information Protection and Electronic Documents Act governs federally regulated private sector employers and applies in provinces without substantially similar legislation, while Alberta's Personal Information Protection Act, British Columbia's Personal Information Protection Act, and Quebec's Act Respecting the Protection of Personal Information in the Private Sector establish provincial privacy frameworks that directly affect how investigators can collect, use, and disclose personal information during the interview process.