Texas Penal Code § 19.05. CRIMINALLY NEGLIGENT HOMICIDE.
(a) A person commits an offense if he causes the death of an individual by criminal negligence.
(b) An offense under this section is a state jail felony.
§ 6.03(d) A person acts with criminal negligence, or is criminally negligent, with respect to circumstances surrounding his conduct or the result of his conduct when he ought to be aware of a substantial and unjustifiable risk that the circumstances exist or the result will occur. The risk must be of such a nature and degree that the failure to perceive it constitutes a gross deviation from the standard of care that an ordinary person would exercise under all the circumstances as viewed from the actor's standpoint.