Texas Election Code - ELEC § 273.003. Impounding Election Records

(a) In the investigation of an election, a county or district attorney or the attorney general may have impounded for the investigation the election returns, voted ballots, signature roster, and other election records.

(b) To have election records impounded, the investigating officer must apply to a district court for an order placing the election records in the court's custody for examination by the officer.

(c) The application for impoundment must be filed with the district court of the county in which the election was held or an adjoining county. An application for records of a statewide election may be filed in the county in which the election was held, an adjoining county, or Travis County.

(d) On the filing of an application, the district judge shall issue an order impounding the records in a secure place under the terms and conditions the judge considers necessary to keep them under the judge's custody and control during the examination and for any additional time the judge directs.