August Vollmer promoted the model of policing during the Reform Era, which emphasized centralized police organizations, increased use of technology, and the use of regulations and guidelines to limit police discretion.

Explanation:

During the Reform Era, there was major model of policing which was used for addressing the issue of crimes. It was called the professional model.

The professional model refers to the practice of policing and tackling criminal problems with the use of modern technological equipment and systematic police force.

August Vollmer was Berkeley’s chief of police from 1909-1931 who has contributed significantly in promoting an efficient police system. He introduced various methods of enhancing and transforming the police force in the country such as centralized police records system, use of technological equipment, establishing regulations and guidelines to limit police discretion, etc.

are there any options?