Which of the following is NOT one of the three types of policing styles?

The correct choice identifies "Informal style" as not being one of the three recognized types of policing styles. In the study of policing, the three main styles commonly referenced are the Watchman, Legalistic, and Service styles.

The Watchman style focuses on maintaining order and is characterized by a more informal approach, often prioritizing peacekeeping and discretion over strict law enforcement. The Legalistic style, on the other hand, emphasizes adherence to the law and uniform enforcement without much deviation or consideration for community context. The Service style is oriented towards helping the community and addressing social issues, often involving a proactive approach to crime prevention and community engagement.

Since "Informal style" is not categorized among these established types, it stands out as the correct answer in this context. Understanding these styles helps in recognizing different policing philosophies and their implementations in various community settings, where the definitions and applications can greatly influence police interactions with the public.