Brooks had let a bail bondsman onto her Rogers County property Monday after finding out one of her employees, Quintine Cornelius Harper, 24, was wanted on an outstanding warrant, "Entertainment Tonight" reported Tuesday.
Harper allegedly drew a gun and forced Brooks to drive him several miles before she finally stopped the car and ran into a convenience store, authorities said.
Harper was arrested and charged Tuesday with kidnapping and weapons violations.
Brooks was married to the country star for 15 years and is the mother of his three children. None of the children were home at the time, "ET" said.
Brooks and his new wife, country singer Trisha Yearwood, live nearby.