and more than a dozen others injured after the school bus crashed into a tree. this happened in chattanooga.. ((dave courvoisier)) that driver. johnthony walker is facing several charges.. including vehicular homicide and reckless driving. the children on the bus - all from an elementary school. the oldest in fifth grade. the youngest in kindergarten. pictures from the scene show the bus wrapped around a tree. crushing it./// (( certainly speed is being investigated very very strongly as a factor in this crash. this has been a great tragedy for us. we have suffered a great loss today. everyone in our community, this has been one of the wor d we ve had in hamilton county. )) ((dave courvoisier)) once again. we want to report that the bus driver has been arrested tonight./// ((denise valdez)) and it appears the shootings of 4 different police officers nationwide. are not connected. it s been labeled as bloody sunday. one officer shot and killed in texas. two