create a conclusion sentence for this passage: The two things I learned from chaper 1 is how in a democracy, police legitimacy requires public trust and confidence, which can be fostered by adopting a "guardian" mindset focused on procedural justice rather than a "warrior" mindset along with to be effective in fighting crime, the police need community cooperation. That cooperation, however, does not come automatically. People are more likely to cooperate if they regard the police as legitimate. Another thing I learned from this course from chapter 14 Internal accountability for police officers' conduct is primarily the responsibility of each police department, and effective control requires robust procedures in policy, training, supervision, and review, as highlighted by the PTSR Framework, to ensure comprehensive oversight and enforcement including the approach to police accountability in the United States is a multifaceted system combining internal and external mechanisms that reflect the democratic principle of checks and balances, influenced by both historical shifts and evolving forms of oversight