abc s will carr right there on the fire lines in northern california for us. reporter: david, tonight crews are fighting fire with fire. they have started this back burn. you can see and hear those flames eating through the bone-dry brush. the crews trying to use their flames here to cut off the fire s path. you can see the flames still running along i-5 here. this is shut down for more than 45 miles. flames are running on both sides. it s still a very volatile situation heading into the weekend. david. will carr on the scene again for us tonight. thank you, will. we turn next to the breaking headlines out of dallas at this hour. a police officer now facing an arrest warrant. authorities say she walked into an apartment thinking it was her own, and then shot and killed her neighbor. there are disturbing questions tonight about how this could happen, and abc s marcus moore from dallas. reporter: police in dallas tonight investigating a puzzling death inside this apartment buildi