Iowa Code § 704.13 (2018)
Title XVI Criminal Law and Procedure
Subtitle 1 Crime Control and Criminal Acts
Chapter 704 Force — Reasonable or Deadly — Defenses
A person who is justified in using reasonable force against an aggressor in defense of oneself, another person, or property pursuant to section 704.4 is immune from criminal or civil liability for all damages incurred by the aggressor pursuant to the application of reasonable force.