Police say a South Jersey driver was under the influence of marijuana when he struck and killed a pedestrian in August. Zachary T. Landis, 27, of Deptford Township, was driving south on College Avenue in Vineland around 9 p.m. on Aug. 30, 2021, when he struck Starlina Welden, 29, of Millville, who was walking southbound in the roadway, according to Vineland police. Welden was pronounced dead at the scene. Landis was charged Tuesday with strict liability vehicular homicide “specifically by being under the influence of marijuana (THC) at the time of the fatal pedestrian crash,” police said. He w…