Tex. Code Crim. Proc. art. 31.02
Whenever the district or county attorney shall represent in writing to the court before which any felony or misdemeanor case punishable by confinement, is pending, that, by reason of existing combinations or influences in favor of the accused, or on account of the lawless condition of affairs in the county, a fair and impartial trial as between the accused and the State cannot be safely and speedily had; or whenever he shall represent that the life of the prisoner, or of any witness, would be jeopardized by a trial in the county in which the case is pending, the judge shall hear proof in relation thereto, and if satisfied that such representation is well-founded and that the ends of public justice will be subserved thereby, he shall order a change of venue to any county in the judicial district in which such county is located or in an adjoining district.
Tex. Code Crim. Proc. § 31.02