Use both the textbook and outside resources such as the Internet and library resources. Step 2 Create a presentation. Design a five- to eight-slide PowerPoint presentation. The slides should present information on how police have become more innovative over the years, the various policing styles that have been used, and the police subcultures that have existed. At the end of your presentation make sure to list the pros and cons of having a chain of command and a brief reasoning for why as this will be discussed in class.Be creative in your presentation. Make sure that your presentation includes speaker notes.