Anthony G. Vaughn was arrested early Sunday.
Authorities say a warrant was issued for the 41-year-old Vaughn after labs linked his DNA to evidence from those previous sexual assaults.
Douglas County Attorney Don Kleine says it’s not clear why it took nearly two years for authorities to compare Vaughn’s DNA with the FBI database of crimes.
Authorities are also checking whether Vaughn may be linked to any other sexual assaults.
In February 1999, a jury acquitted Vaughn of sexual assault in a separate case.