Sullivan County Rescue Officials Now Have A Device To Help Them Find A Man Who Has Been Missing For A Few Weeks In South Holston Lake. Matt Ragan Is Believed To Have Drowned After His Boat Was Found Upside Down In The Water. Search Crews Tested Out An Underwater Remote Operating Vehicle Which Features An Underwater Camera. Sullivan County Ema Director Jim Bean Said They’re Still Learning How To Use It. The Device Will Be Used Soon To Hopefully Retrieve Ragan’s Body.