Double Naught Spy
Sus Venator
Here is the penal code from Texas in regard to the duty to retreat when lethal force is warranted. Simply put, it is stated explicitly that there is NO DUTY TO RETREAT!
http://www.capitol.state.tx.us/statutes/docs/PE/content/htm/pe.002.00.000009.00.htm
§ 9.21. PUBLIC DUTY. (a) Except as qualified by
Subsections (b) and (c), conduct is justified if the actor
reasonably believes the conduct is required or authorized by law,
by the judgment or order of a competent court or other governmental
tribunal, or in the execution of legal process.
(b) The other sections of this chapter control when force is
used against a person to protect persons (Subchapter C), to protect
property (Subchapter D), for law enforcement (Subchapter E), or by
virtue of a special relationship (Subchapter F).
(c) The use of deadly force is not justified under this
section unless the actor reasonably believes the deadly force is
specifically required by statute or unless it occurs in the lawful
conduct of war. If deadly force is so justified, there is no duty to
retreat before using it.
http://www.capitol.state.tx.us/statutes/docs/PE/content/htm/pe.002.00.000009.00.htm
§ 9.21. PUBLIC DUTY. (a) Except as qualified by
Subsections (b) and (c), conduct is justified if the actor
reasonably believes the conduct is required or authorized by law,
by the judgment or order of a competent court or other governmental
tribunal, or in the execution of legal process.
(b) The other sections of this chapter control when force is
used against a person to protect persons (Subchapter C), to protect
property (Subchapter D), for law enforcement (Subchapter E), or by
virtue of a special relationship (Subchapter F).
(c) The use of deadly force is not justified under this
section unless the actor reasonably believes the deadly force is
specifically required by statute or unless it occurs in the lawful
conduct of war. If deadly force is so justified, there is no duty to
retreat before using it.