Tennessee Code Title 8. Public Officers and Employees § 8-19-402

(1) Where the security of the original bond has become insufficient by the subsequent insolvency, death, or removal of the sureties thereto, or any of them;

(2) When there is good reason to fear the public interest may suffer for want of such new and additional security; and

(3) When the grand jury of the county, or a majority thereof, certifies the insufficiency of the original bond.