Ind. Code § 35-35-1-4
(c) After being sentenced following a plea of guilty, or guilty but mentally ill at the time of the crime, the convicted person may not as a matter of right withdraw the plea. However, upon motion of the convicted person, the court shall vacate the judgment and allow the withdrawal whenever the convicted person proves that withdrawal is necessary to correct a manifest injustice. A motion to vacate judgment and withdraw the plea made under this subsection shall be treated by the court as a petition for postconviction relief under the Indiana Rules of Procedure for Postconviction Remedies. For purposes of this section, withdrawal of the plea is necessary to correct a manifest injustice whenever:
(5) the plea and judgment of conviction are void or voidable for any other reason.
The motion to vacate the judgment and withdraw the plea need not allege, and it need not be proved, that the convicted person is innocent of the crime charged or that he has a valid defense.
(e) Upon any motion made under this section, the moving party has the burden of establishing his grounds for relief by a preponderance of the evidence. The order of the court upon a motion made under subsection (b) or (c) of this section shall constitute a final judgment from which the moving party or the state may appeal as otherwise provided by law. The order of the court upon a motion made under subsection (a) of this section is not a final judgment and is not appealable but is reviewable upon appeal from a final judgment subsequently entered.
As added by Acts 1981, P.L.298, SEC.4. Amended by Acts 1982, P.L.204, SEC.25; P.L.320-1983, SEC.17.