Versions of Iowa Code 679B.8 - Evidence -- witnesses on LawServer 2023 Iowa Code 679B.8 – Evidence — witnesses 2022 Iowa Code 679B.8 – Evidence — witnesses. 2020 Iowa Code 679B.8 – Evidence — witnesses. 2018 Iowa Code 679B.8 – Evidence — witnesses. 2016 Iowa Code 679B.8 – Evidence 2014 Iowa Code 679B.8 – Evidence – witnesses. 2009 Iowa Code 679B.8 – Evidence — witnesses