Indiana Code Title 35. Criminal Law and Procedure § 35-37-5-5

Sec. 5. (a) If a person in any state that has made provision for commanding persons within its borders to attend and testify in criminal prosecutions in this state or grand jury investigations commenced or about to commence in this state is a material witness in a prosecution pending in a court of record in this state or in a grand jury investigation which has commenced or is about to commence in this state, a judge of the court may issue a certificate under the seal of the court stating these facts and specifying the number of days the witness will be required.  This certificate shall be presented to a judge of a court of record in the county of the state in which the witness is found.

(b) If the witness is summoned to attend and testify in this state, the witness shall be tendered a sum for expenses equal to the amount provided under IC 33-37-10-2.  The fees shall be a proper charge upon the county in which the criminal prosecution or grand jury investigation is pending.

(c) A witness who has appeared in accordance with the provisions of the subpoena shall not be required to remain within this state for a longer period of time than the period mentioned in the certificate, unless otherwise ordered by the court.

(d) If the witness fails without good cause to attend and testify as directed in the subpoena, the witness shall be punished in the manner provided for the punishment of any witness who disobeys a subpoena issued from a court of record in this state.