This document discusses challenging subjects in workplace harassment investigations. It identifies common types of difficult parties, including alleged wrongdoers like manipulative harassers or those in high positions, as well as complainants like poor performers or those making parting shot complaints. It emphasizes the core objectives of gathering facts, responding appropriately to minimize liability, and optimizing future conduct. Specific examples are provided, such as how to handle a CEO accused of harassment or a manipulative harasser who denies claims that can't be proven. Throughout, it stresses properly communicating the investigation process and documenting actions and reasons for decisions.