Thomas Andy Richmond, 56, left his canal-side home in Ocean Isle Beach, North Carolina, on the morning of July 1, 2010 for a solo outing in his 28-foot fishing boat Heads or Tails. He departed around 8:30 a.m.; when he failed to return his wife reported him overdue at 10:00 p.m. that evening.

Around 11:20 p.m. tourists found Richmond’s boat washed ashore just south of Myrtle Beach, South Carolina, with its engine running and lights on but no sign of him aboard. A tracking device showed the vessel had traveled about 167 miles. The U.S. Coast Guard, South Carolina Department of Natural Resources, South Carolina Law Enforcement Division and Horry County authorities conducted air and sea searches covering roughly 1,783 square nautical miles over about 48 hours but found no trace of Richmond.

A court issued a legal declaration of death in April 2011, and Richmond is presumed lost at sea. Does anyone who knew Thomas or who was on that stretch of coast that night have information that could help explain what happened?