Ind. Code § 35-35-2-1
(a) Pleadings in criminal proceedings are:
(3) pleas of:
(C) guilty but mentally ill at the time of the crime.
Defenses and objections raised before trial which, before July 26, 1973, could have been raised by a plea in abatement, a plea in bar, a demurrer, a motion to quash, or any other plea not specifically allowed under this subsection may be raised only by motion to dismiss or to grant appropriate relief as provided in this title.
(c) Except as provided in this title, whenever the defendant files a motion, the state may file an answer to that motion. If no answer is filed by the state, all issues of fact and law raised by the motion stand at issue and the court shall proceed.
As added by Acts 1981, P.L.298, SEC.4. Amended by Acts 1982, P.L.204, SEC.26.