Dr. William Coltharp, a 55-year-old cardiothoracic surgeon from Nashville, disappeared after telling his wife on October 2, 2011 that he was going kayaking on Center Hill Lake and would be home for dinner. His overturned kayak was found about a mile from the Hurricane Bridge boat ramp where his vehicle was parked; a life jacket and his laptop were discovered inside a dry storage compartment. A witness reported seeing a man matching Coltharp’s description loading a cinder block into a kayak before paddling out. An empty gun case belonging to him was found under rocks near the ramp.

Despite extensive searches of the lake that included cadaver dogs, Coltharp was never located and the active search was eventually called off. Nearly two months later his wife sought a conservator for his estate, stating she believed he had died on the lake. A memorial service and obituary were held in April 2015. What did anyone in the Smithville or Center Hill Lake area notice that night or in the days after that might help explain those puzzling clues?