Versions of Iowa Code 553.9 - Investigation on LawServer 2024 Iowa Code 553.9 – Investigation 2023 Iowa Code 553.9 – Investigation 2022 Iowa Code 553.9 – Investigation 2020 Iowa Code 553.9 – Investigation 2018 Iowa Code 553.9 – Investigation 2016 Iowa Code 553.9 – Investigation 2014 Iowa Code 553.9 – Investigation. 2009 Iowa Code 553.9 – Investigation