I read a very good book on this subject a couple years ago, Red Star Rogue. The author makes a very convincing arguement on that path. One key piece of evidence he discussed was the fact that CIA admitted to recovering the ship's bell, which would be located in an area of the wreckage not admitted to being recovered by CIA. The book actually makes some very frightening suppositions about the Golf's last patrol and reason for loss, but I will not delve in to that here.