Attorneys for the slain man, Freddy Nelson, said Friday that TMT Development and Cornerstone Security created a “culture of violence” at the Delta Park shopping center, while defense lawyers argued that only the ex-guard and now convicted murderer Logan Gimbel was responsible for pulling the trigger.

At around 7:26 p.m. on Thursday, Portland police responded to reports of person shot at a TriMet MAX platform at Northeast 148th Avenue and East Burnside Street in the Hazelwood neighborhood. When officers arrived, they found a man dead at the scene.