Law enforcement agencies report the number of known index crimes (Murder, Rape, Robbery, Aggravated Assault, Burglary, Larceny Theft, Motor Vehicle Theft, Arson, and Human Trafficking) or offenses from their local records of complaints from victims, reports from witnesses and from crimes discovered by an agency during its operations.  Reports that are later determined to be unfounded are eliminated from the totals.  The resulting number of ‘offenses known to law enforcement officials’ is reported without regard to whether arrests were made, stolen property recovered or whether prosecution took place.  Agencies report additional data such as the value of property stolen and recovered, circumstances surrounding homicides, family violence, hate crimes, and reports of persons arrested for all crimes. Arrest reports are categorized by the arrestee’s age, sex, race, and ethnic origin.