As communities across the U.S. confront misconduct and work to promote constitutional policing, this timely handbook provides best practices in conducting and reviewing police complaint investigations at all levels, from discourtesy to excessive use of force and systemic issues. The Police Misconduct Complaint Investigations Manual is a comprehensive guide for administrative misconduct inquiries, including intake, steps for conducting robust investigations, data tracking, and reporting on trends. The Manual is a critical primer for civilian oversight practitioners, internal affairs investigators, police managers, auditing professionals, government representatives, community advocates, law enforcement leaders, criminal and social justice students, and all others in pursuit of fair, thorough, and timely investigations of police misconduct complaints.