Ind. Code § 12-26-1-3

Sec. 3. A court that conducted the trial has jurisdiction over a hearing required to be held by IC 35-36-2-4. The court retains jurisdiction over the individual held under IC 35-36-2-4 until the completion of the commitment hearing. After completion of the commitment hearing, jurisdiction is transferred to a court having jurisdiction under section 2 of this chapter and all subsequent petitions or motions shall be filed with the court to which the proceeding is transferred. The file of the commitment hearing also shall be transferred from the committing court to the court having probate jurisdiction.