The document outlines 10 critical mistakes that can occur in workplace investigation programs and how to avoid them. It discusses mistakes related to having an incomplete system, not taking care of details, not paying attention to trends, not collaborating with others, not following proper processes, using the wrong investigator, not challenging the investigator, overstepping boundaries, assuming procedural fairness is easy, and thinking investigations can't be challenged. It provides tips for business leaders, HR leaders, and investigators to review practices, collaborate with peers, and continuously improve their workplace investigation programs to avoid common pitfalls.