August Vollmer (1876-1955) was the first police officer chief in suggest "higher education as the central element for professionalizing the police, for giving them dignity and rising their social status". Moreover, he was the first police chief who created a motorized force and in cars and the first to use the lie detector.
Orlando W. Wilson (1900-1972) Started the planning, installed records, completely reorganized the departmental structure lengthened training, emphasized college education and instituted communications. Moreover, he was known for his "Ethical behavior and for eliminating police corruption" Manual.