Texas Code of Criminal Procedure - CRIM P Art. 2.13. Duties and powers

(1) in every case authorized by the provisions of this Code, interfere without warrant to prevent or suppress crime;

(2) execute all lawful process issued to the officer by any magistrate or court;

(3) give notice to some magistrate of all offenses committed within the officer's jurisdiction, where the officer has good reason to believe there has been a violation of the penal law; and

(4) arrest offenders without warrant in every case where the officer is authorized by law, in order that they may be taken before the proper magistrate or court and be tried.

(1) investigate the offense; or

(2) provide the victim or witness with information about federal visas designed to protect individuals providing assistance to law enforcement.

(1) conducting a separate investigation of any other alleged criminal offense; or

(2) inquiring as to the nationality or immigration status of a victim of or witness to a criminal offense if the officer has probable cause to believe that the victim or witness has engaged in specific conduct constituting a separate criminal offense.