A second boy has died after being shocked by a faulty cord from a houseboat while swimming in Cherokee Lake. 11 year old Nathan Lynam died Thursday night at Children's Hospital in Knoxville. Ten-year-old Noah Winstead of Morristown died at the scene Wednesday afternoon. Tennessee Wildlife Resources Agency investigators are looking for the source of the electrical charge. The two boys were swimming between two houseboats when they were shocked. (jb)