Texas Code of Criminal Procedure - CRIM P Art. 29.04. First motion by state

1. The name of the witness and his residence, if known, or that his residence is unknown;

2. The diligence which has been used to procure his attendance; and it shall not be considered sufficient diligence to have caused to be issued, or to have applied for, a subpoena, in cases where the law authorized an attachment to issue; and

3. That the testimony of the witness is believed by the applicant to be material for the State.