If a person has been convicted of a crime as provided by this chapter and has given a DNA sample or samples to law enforcement for any purpose, the bureau of forensic services is authorized to analyze such samples for DNA, and include the DNA profiles from such samples in the state’s convicted felon DNA databank and databases. This provision applies whether the DNA sample originally collected was from a sexual or violent offender pursuant to the databank and database program, and whether the crime committed predated the effective date of this chapter, or any amendments thereto. This provision does not relieve a person subject to the terms of this chapter from giving a DNA sample and thumbprint impression for the DNA databank and database.