What really happened to American honeymooner Tina Watson

What really happened to American honeymooner Tina Watson - who mysteriously drowned during a scuba diving trip with her husband on the Great Barrier Reef in 2003. The subject of the book by Dr Lindsay Simpson, Head of Journalism at James Cook University, Townsville, and co-author of Honeymoon Dive: The Real Story Of The Tragic Honeymoon Death Of Tina Watson