Texas Penal Code - PENAL § 7.02. Criminal Responsibility for Conduct of Another

(1) acting with the kind of culpability required for the offense, he causes or aids an innocent or nonresponsible person to engage in conduct prohibited by the definition of the offense;

(2) acting with intent to promote or assist the commission of the offense, he solicits, encourages, directs, aids, or attempts to aid the other person to commit the offense;  or

(3) having a legal duty to prevent commission of the offense and acting with intent to promote or assist its commission, he fails to make a reasonable effort to prevent commission of the offense.