A story that has held the attention of many Marblehead residents over the last few months took an interesting turn Monday, when a goat was found killed on an island in Little Harbor. The goat was among the five that native Marbleheader and local restauranteur Peter Noyes brought with him when he began preparations for a since denied development project on Gerry Island in May. As the story has developed, Marblehead residents living along the shoreline have watched on as Noyes drove a large four-wheel vehicle out to the island with a crane attached to move rocks, established a small herd of …