Kenneth Nelson Stone, a 38-year-old fisherman, disappeared on June 13, 1970, after leaving Owls Head, Maine, alone in his 25-foot boat for a lobster trip. By mid-morning his boat was found aground on a ledge near Marblehead Island at the entrance to Penobscot Bay with the throttle in the full-on position but the engine stopped. A jacket and a vacuum bottle of hot coffee were found floating nearby, and a freshly baited lobster trap lay close to the boat.

The Coast Guard, a helicopter, and more than 20 local lobster boats conducted an extensive search but never located Stone or any additional evidence or remains. Authorities ultimately presumed he drowned, but the case remains classified as missing and the circumstances — boat position, personal items in the water, and no sign of Stone — are unexplained.

Did anyone who fished around Marblehead Island in June 1970 or who knew Kenneth have information that could shed light on what happened that morning?