Thirteen people have been shot at an impromptu memorial service for a man who was murdered earlier this month, authorities said. . . . An 'extremely large' crowd was gathered in a vacant lot on Martin Luther King Drive at East 4th Street to remember Dominique James, 29, investigators said. ... The scene was so chaotic, with wounded people being taken to several different hospitals that investigators haven't been able to find and interview all the wounded people, Tervalon said.