Texas Code of Criminal Procedure - CRIM P Art. 14.03. Authority of peace officers

(1) persons found in suspicious places and under circumstances which reasonably show that such persons have been guilty of some felony, violation of Title 9, Chapter 42, Penal Code, breach of the peace, or offense under Section 49.02, Penal Code, or threaten, or are about to commit some offense against the laws;

(2) persons who the peace officer has probable cause to believe have committed an assault resulting in bodily injury to another person and the peace officer has probable cause to believe that there is danger of further bodily injury to that person;

(3) persons who the peace officer has probable cause to believe have committed an offense defined by Section 25.07, Penal Code, if the offense is not committed in the presence of the peace officer;

(4) persons who the peace officer has probable cause to believe have committed an offense involving family violence;

(5) persons who the peace officer has probable cause to believe have prevented or interfered with an individual's ability to place a telephone call in an emergency, as defined by Section 42.062(d), Penal Code, if the offense is not committed in the presence of the peace officer;  or

(6) a person who makes a statement to the peace officer that would be admissible against the person under Article 38.21 and establishes probable cause to believe that the person has committed a felony.

(g)(1) A peace officer listed in Subdivision (1), (2), or (5), Article 2.12, who is licensed under Chapter 1701, Occupations Code, and is outside of the officer's jurisdiction may arrest without a warrant a person who commits any offense within the officer's presence or view, other than a violation of Subtitle C, Title 7, Transportation Code.  1

(2) A peace officer listed in Subdivision (3), Article 2.12, who is licensed under Chapter 1701, Occupations Code, and is outside of the officer's jurisdiction may arrest without a warrant a person who commits any offense within the officer's presence or view, except that an officer described in this subdivision who is outside of that officer's jurisdiction may arrest a person for a violation of Subtitle C, Title 7, Transportation Code, only if the offense is committed in the county or counties in which the municipality employing the peace officer is located.

(3) A peace officer making an arrest under this subsection shall as soon as practicable after making the arrest notify a law enforcement agency having jurisdiction where the arrest was made.  The law enforcement agency shall then take custody of: