Texas Penal Code - PENAL § 8.07. Age Affecting Criminal Responsibility

(a) A person may not be prosecuted for or convicted of any offense that the person committed when younger than 15 years of age except:

(b) Unless the juvenile court waives jurisdiction under Section 54.02, Family Code, and certifies the individual for criminal prosecution or the juvenile court has previously waived jurisdiction under that section and certified the individual for criminal prosecution, a person may not be prosecuted for or convicted of any offense committed before reaching 17 years of age except an offense described by Subsections (a)(1)-(5).

(c) No person may, in any case, be punished by death for an offense committed while the person was younger than 18 years.

(d) Notwithstanding Subsection (a), a person may not be prosecuted for or convicted of an offense described by Subsection (a)(4) or (5) that the person committed when younger than 10 years of age.

(e) A person who is at least 10 years of age but younger than 15 years of age is presumed incapable of committing an offense described by Subsection (a)(4) or (5). This presumption may be refuted if the prosecution proves to the court by a preponderance of the evidence that the actor had sufficient capacity to understand that the conduct engaged in was wrong at the time the conduct was engaged in. The prosecution is not required to prove that the actor at the time of engaging in the conduct knew that the act was a criminal offense or knew the legal consequences of the offense.