It shall be the duty of the state auditor to make an investigation as a part of his audit of each and every department of the state government. When there are facts, records, circumstances, or information that indicate mismanagement or misconduct on the part of any official or employee of any department of the state government during either a past or present administration, it shall be the duty of the state auditor to make the full investigation, as provided in Code Section 50-6-29, of the department, official, or employee.