What are offenses known to the police and what are advantages and disadvantages of using it?

The offenses known to the police are a crime index, reported to the federal bureau investigation’s uniform crime reports, composed of crimes that are both reported and recorded by the police. In addition, a crime rate is a measure of the incidence of crime expressed as the number of crimes per unit of the population or other base, it is used because they are more comparable instead of total numbers.