Steve Bebb, district attorney for Bradley, McMinn, Monroe and Polk counties, will leave office at the end of this month, state sources confirm.
Bebb declined to comment this afternoon.
He is taking retirement two months short of the end of his term. In a letter to state lawmakers in January, Bebb, 73, said he has heart trouble and has had bypass surgery.
Bebb served three terms as Criminal Court judge in the 10th Judicial District from 1982 to 2006, when he was elected district attorney.
In the last two years, Bebb has been the subject of numerous investigations by the Tennessee Bureau of Investigation, the state Legislature and others.
The probes were sparked by a Times Free Press series in August 2012 and ongoing stories since then detailed allegations of financial and prosecutorial misconduct.
It will be up to Gov. Bill Haslam to appoint an interim district attorney to oversee the final two months of Bebb's term.
That person could be District Attorney-elect Steve Crump, who won the May Republican primary and has no Democratic opposition in the August election, will take office Sept. 1.