What efforts did Vollmer utilize to improve the caliber of police personnel?

August Vollmer implemented several key initiatives to enhance the quality of police personnel. He emphasized the importance of education by advocating for a college degree requirement for police officers and established training programs that focused on modern policing techniques. Vollmer also promoted the use of psychological testing in recruitment and encouraged a professional approach to law enforcement, which included adopting ethical standards and community engagement practices. These efforts collectively aimed to create a more competent and professional police force.