Versions of Missouri Laws 577.300 - Leaving a child unattended in a motor vehicle -- first and second degree -- .. on LawServer 2023 Missouri Laws 577.300 – Leaving a child unattended in a motor vehicle — first and second degree — .. 2022 Missouri Laws 577.300 – Leaving a child unattended in a motor vehicle — first and second degree — … 2020 Missouri Laws 577.300 – Leaving a child unattended in a motor vehicle — first and second degree — … 2018 Missouri Laws 577.300 – Leaving a child unattended in a motor vehicle — first and second degree — … 2016 Missouri Laws 577.300 – Beginning January 1, 2017–Leaving a child unattended in a motor vehicle–first and second degree–penalties 2015 Missouri Laws 577.300 – Beginning January 1, 2017–Leaving a child unattended in a motor vehicle–first and second degree–penalties 2014 Missouri Laws 577.300 – Beginning January 1, 2017–Leaving a child unattended in a motor vehicle–first and second degree–penalties