RUTLAND, Vt. (AP) - A 28-year-old man who was rescued from a raft off the coast of New England in 2016 after his boat sank has pleaded not guilty to charges he killed his mother at sea to inherit the family's estate. Nathan Carman was arraigned in federal court in Vermont on multiple fraud charges and a first-degree murder charge in the death of Linda Carman. The indictment says Nathan Carman also shot and killed his grandfather, John Chakalos, at his home in Windsor, Connecticut, in 2013 as part of the inheritance scheme, but he was not charged with that killing.