Those crimes that are reported to, detected by, or otherwise drawn to the attention of the police. What constitutes a crime as well as the definitions of different types of crimes also varies from country to country. Therefore, comparisons should be used with caution. Where investigation of one crime reveals the existence of other unrelated crimes, each crime is recorded separately. Where a case includes several related offences, the most serious crime is recorded. One offence committed by several offenders is recorded as one crime.