The most important lesson of chapter 1, tells how the American police service have changed over time, and why it cannot be understood properly if it is examine alone. For example, in a crime scene, an officer has to gather his information from the witness otherwise he or she would never solve the crime, however, in working with the communities make their job a lot easier to find suspects. Many cases are still out there unsolved because they law enforcements can’t do the job alone. At the beginning of the 20th century, cities were staggering under the burden of machine politic, corruption, crime, poverty, and exploitation of women and children by industry. The police was less involved because during this…