Are the Police Effective in Their Role as Law Reinforcers?

Police are an important part of our society, they take part in administering the law. Without them, our society will be corrupt and unmanageable. But are the police given enough power to efficiently get their job done?
Firstly, if a person is suspected of committing a crime and he is arrested, the police must find further evidence within 48 hours, otherwise the suspect will be released. Also, after the police have arrested the suspect or taken him into custody, the suspect still has a lot of rights. For example, while the police are conducting a tape recorded interview with the suspect, the suspect has the right to remain silent and say "no comment" all the way through. …