A criminal database is a collection of information that stores records related to criminal activities, offenders, and law enforcement actions. These databases can include details such as arrest records, convictions, and sentencing information. They are used by police, legal professionals, and researchers to track crime trends and identify repeat offenders. Access to a criminal database can help ensure public safety by allowing authorities to quickly retrieve information about individuals with criminal backgrounds. Many countries maintain these databases, which may be accessible to the public or restricted to law enforcement agencies, depending on local laws and regulations.