Warning: Graphic video accompanies this story.Police shot and killed a man described as homeless on Sunday in downtown Los Angeles.Officers responded to radio calls about a robbery and battery about noon on San Pedro Street near the Union Rescue Mission, Los Angeles police officer Dave Romero told The Washington Post. He said that when police arrived at the scene in what’s referred to as the city’s “skid row” — an area frequented by the homeless lined with tents, trash and old grocery carts — they said they encountered a suspect and “use of force” ensued.