This document discusses best practices for conducting workplace investigations and determining root causes. It outlines the key elements of a thorough investigation, including debriefing involved parties, gathering and analyzing evidence, and assessing credibility. When making a determination, the investigator should have proof for each policy element and close any gaps. There are three potential conclusions: substantiated, unsubstantiated, or inconclusive. Root cause analysis seeks to understand why the misconduct occurred by examining multiple contributing factors beyond any one individual, such as organizational systems involving people, methods, policies, management, and communication. Identifying all potential causes can help prevent recurrence.