Tod Friend, an owner of Tomales Bay Oyster Company, disappeared on Tuesday afternoon, sparking a search and rescue effort that continued through Wednesday.
An employee of Hog Island Oyster Company spotted his unmanned motorboat driving in circles near Cypress Grove Preserve at around 3:15 p.m. A 911 call indicated that someone was also seen in the water.
Officials from the Coast Guard, the Marin County Fire Department, the National Park Service and the Marin County…