Black Hawk County Sheriffs Office is a full-service law enforcement agency that offers street patrolling, and security services to the protection of life and properties of residents and businesses. It offers firearm permit application assistance and renewal services. The office maintains a database of sex offenders and residency restriction sites. It conducts criminal investigations, as well as provides jail and civil services. Black Hawk County Sheriffs Office conducts arrests for various offences, such as burglaries, domestic assaults, drug violations, kidnappings, robberies and murders. Additionally, the office investigates cases related to sexual offenses, thefts, child abuse, and drugs and narcotics and maintains a record of victim information.