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The criminal justice system is composed of those agencies which (must )enforce the laws that society has enacted for its self-protection and preservation Theoretically, it is an integrated apparatus whose functions are to apprehend, prosecute, convict, sentence, and correct offenders The US system is federal by its nature, i.e. it consists of three subsystems: state, local and federal criminal justice agencies. The system is composed of three components: police, court, corrections. Each component (must )contribute to the same goal — the prevention and control of crime and the rehabilitation of offenders. So the effectiveness of the whole system depends on the efficient functioning of each component and their efficient interaction. But at present the criminal justice system doesn't work successfully. Of the several million serious crimes reported every year to police, ranging from murder to car theft, only one in nine; results in a conviction. The rate of solution varies with different crimes.' Murder is usually reported, and 86 per cent of all reported murders lead to arrests. Among those arrested, however, only 64 per cent are prosecuted and not more than 43 per cent of the cases prosecuted result in; convictions. Of persons prosecuted for murder 19 per cent are convicted; 6f a lesser crime and 38 per cent are acquitted or dismissed. In contrast,} only 19 per cent of all the burglaries reported to police lead to an arrest. Four out of five arrested are prosecuted and 56 per cent are found guilty. So, for every twelve burglaries reported there is one conviction. Robbery — taking property from a person by force or threat of force — is a crime of violence, dangerous to life and increasing rapidly. But chances of a robber being convicted are small. Only 27 per cent of all; robberies lead to an arrest. Of those arrested, 63 per cent are prosecuted, of whom one-half are convicted.