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A poorly run investigation creates as much legal risk as the original incident. This guide gives HR professionals a rigorous, evidence-based investigation framework that is defensible in any employment forum.
Eleven parts covering: investigation principles, initiation and scoping, planning, evidence gathering, conducting investigative interviews (with three full interview templates), evidence assessment, the investigation report, outcomes and next steps, and special circumstances (protected disclosures, senior leaders, criminal conduct). Nine jurisdiction flags covering employment forums, privacy law, companion rights, self-incrimination, whistleblowing protections, standard of proof, and file retention for IE, UK, EU, US, CA, and AU.
FAQS
Q Who should conduct a workplace investigation?
Someone with no prior involvement in the matter and no personal relationship with either party. They should have sufficient seniority and authority to access the people and documents they need. In smaller organizations, this may mean using an HR professional from another function or engaging an external investigator. Critically: the investigator must never also chair the disciplinary hearing that follows — this is one of the most common and costly procedural errors.
Q What standard of proof applies?
The civil standard: balance of probabilities. This means a finding is made where it is more likely than not that the alleged conduct occurred. This is significantly lower than the criminal standard. In the US, the equivalent is 'reasonable belief' — the employer had an honest, good-faith belief in its findings based on a reasonable investigation. The document covers both standards and explains how to document compliance with whichever applies.
Q How are investigation interviews conducted?
The guide provides three complete interview templates: complainant, respondent, and witness. All include an opening statement, structured question frameworks, and a closing section. The sequence matters: complainant first, then witnesses, then respondent — so the investigator has the fullest picture before the respondent is asked to respond. Reversing this sequence is a procedural error that can invalidate findings.
Q What are the data retention obligations for investigation records?
Retention varies by jurisdiction: UK/Ireland 6–7 years broadly; US 1–6 years depending on statute and employer type; Canada federal employers 36 months; Australia Fair Work Act 7 years. The document includes a detailed jurisdiction flag covering all five jurisdictions and recommends taking legal advice on the specific retention period applicable to a given investigation type.
A poorly run investigation creates as much legal risk as the original incident. This guide gives HR professionals a rigorous, evidence-based investigation framework that is defensible in any employment forum.
Eleven parts covering: investigation principles, initiation and scoping, planning, evidence gathering, conducting investigative interviews (with three full interview templates), evidence assessment, the investigation report, outcomes and next steps, and special circumstances (protected disclosures, senior leaders, criminal conduct). Nine jurisdiction flags covering employment forums, privacy law, companion rights, self-incrimination, whistleblowing protections, standard of proof, and file retention for IE, UK, EU, US, CA, and AU.
FAQS
Q Who should conduct a workplace investigation?
Someone with no prior involvement in the matter and no personal relationship with either party. They should have sufficient seniority and authority to access the people and documents they need. In smaller organizations, this may mean using an HR professional from another function or engaging an external investigator. Critically: the investigator must never also chair the disciplinary hearing that follows — this is one of the most common and costly procedural errors.
Q What standard of proof applies?
The civil standard: balance of probabilities. This means a finding is made where it is more likely than not that the alleged conduct occurred. This is significantly lower than the criminal standard. In the US, the equivalent is 'reasonable belief' — the employer had an honest, good-faith belief in its findings based on a reasonable investigation. The document covers both standards and explains how to document compliance with whichever applies.
Q How are investigation interviews conducted?
The guide provides three complete interview templates: complainant, respondent, and witness. All include an opening statement, structured question frameworks, and a closing section. The sequence matters: complainant first, then witnesses, then respondent — so the investigator has the fullest picture before the respondent is asked to respond. Reversing this sequence is a procedural error that can invalidate findings.
Q What are the data retention obligations for investigation records?
Retention varies by jurisdiction: UK/Ireland 6–7 years broadly; US 1–6 years depending on statute and employer type; Canada federal employers 36 months; Australia Fair Work Act 7 years. The document includes a detailed jurisdiction flag covering all five jurisdictions and recommends taking legal advice on the specific retention period applicable to a given investigation type.
