Rescue crews are searching for someone who fell off a boat in West Knox County in Ft. Loudoun Lake and has not resurfaced. The Knoxville Area Volunteer Rescue Squad says just before 5 p.m. eastern (Wednesday, May 17, 2017) an 18-year-old fell off a boat near Virtue Road. Officials say the teen apparently does not know how to swim. This is a developing news story and more information will be released at a later time.