CHAPTER 83. USE OF FORCE OR DEADLY FORCE
Sec. 83.001. CIVIL IMMUNITY. A defendant who uses force or deadly force that is justified under Chapter 9, Penal Code, is immune from civil liability for personal injury or death that results from the defendant's use of force or deadly force, as applicable.
This is very weak protection.
It requires a finding of "justified" yet there is no legal entity that does that. A jury determines if there is evidence beyond a reasonable doubt, and a grand jury determines if there is probable cause for a trial. Only a matter of time before it is pierced.
Note it also only protects the defendants "use of force or deadly force". Does it protect others who did not use force but were there and contributed in some way?
Be careful out there.