As workplace investigators, we are ever mindful to ensure our investigation process is fair, reasonable, and ultimately withstands legal scrutiny. The 2025 case of Air Canada v Canadian Union of Public Employees, Air Canada Component, 2025 CanLII 39078 (CA LA) (Hastings Discharge Grievance) addresses bias, the standard of proof, and thoroughness. It offers lessons to internal and external investigators on how to help ensure the investigation process withstands turbulence.