ST. PAUL — A murder conviction has been upheld for the second man found to be responsible for a 2019 West Duluth shooting death. The Minnesota Court of Appeals this week affirmed a Duluth jury’s verdict against James Michael Peterson for the killing of Timothy Jon Nelson. Peterson, 43, was found guilty of aiding and abetting intentional second-degree murder at his September 2022 trial. He was later sentenced to nearly 29 years in prison. H…