The Office of Professional Standards is led by Lieutenant Washington and supports the mission statement and core values of the Newnan Police Department and is responsible for conducting internal affairs investigations, background investigations, and maintaining certification records and standards.

Internal Affairs is responsible for investigating inquiries into all complaints and allegations made against members of the Newnan Police Department, to ensure the integrity of the department. Every complaint is objectively and thoroughly investigated. 

Background investigations are completed to maintain the integrity and ethical reputation of the Newnan Police Department. 

In 2015 the Newnan Police Department became a State Certified Agency. Certification is a progressive and time-proven way of helping law enforcement agencies calculate and improve overall performance. Certification represents a significant professional achievement.