MURFREESBORO, Tenn. — Concluding a senior project, six MTSU Aerospace unmanned aircraft systems students helped write a final chapter to a Tennessee State Park mystery that baffled authorities for nearly 14 months.Daryl Hickman of Murfreesboro, Michael Clancy of Franklin, Tennessee, Corwin Cordell of Chattanooga, Tennessee, Aidan Galdino of Brentwood, Tennessee, Calvin Harris of Snellville, Georgia, and Zackary .