Iowa Code § 704.4 (2018)
Title XVI Criminal Law and Procedure
Subtitle 1 Crime Control and Criminal Acts
Chapter 704 Force — Reasonable or Deadly — Defenses
704.4 Defense of property.
A person is justified in the use of reasonable force to prevent or terminate criminal interference with the person’s possession or other right in property. Nothing in this section authorizes the use of any spring gun or trap which is left unattended and unsupervised and which is placed for the purpose of preventing or terminating criminal interference with the possession of or other right in property.