Unidentified floating object on the bay today. The First Response is. Is that really a guy on a bike in the water . male announcer this is the bay area news station, kron 4 news starts now. Our top story at eight twisted wreckage and tragedy for a bay area family. A mother and daughter critically hurt. A teenager killed. Tonight the story behind the horrific accident on the streets of San Francisco there have been questions all day about the driver. Just moments ago kron 4 spoke with representatives from the San Francisco police department. In an unusual decision there will not be any information released about the driver tonight or over the weekend. They would not explain why. In the meantime, they say that police say, it happened when a still unidentified woman, driving a mercedes, slams into the back of a stopped van on pine and gough streets. Tonight, the name of the 16year old killed in the accident has been released. It is kevin san. Kron 4s grant lodes begins our team coverage.