Indiana Code Title 34. Civil Law and Procedure § 34-25.5-2-1

(1) the applicant;  or

(2) some person on the applicant's behalf.

(1) Who is restraining the applicant's liberty, the place where the applicant is being held, and the names of all the parties, if they are known, or descriptions of them if they are not known.

(2) The cause or pretense of the restraint, according to the best of the knowledge and belief of the applicant.

(3) If the restraint is alleged to be illegal, the nature of the illegality.