It's been a mystery that has haunted Lake Huron since the Civil War: What happened to the Keystone State?
The wooden steamer set out from Detroit, bound for Milwaukee, around November 9th, 1861.
She never made it — and no one knew the Keystone State had run into trouble until wreckage washed up on the shore near Lexington.
But thanks to David Trotter, the Keystone State has been found — in nearly 175 feet of water.
Listen to the full interview above.