“Are there any details on what he did to “murder” her? How did he actively take her life?”
“Mr Glasgow found it was likely Mr. Watson had turned off his wife’s air supply, restrained her in a bear hug and then turned the oxygen supply off after she had fallen unconscious before leaving her to fall to the ocean floor.”
http://www.theaustralian.news.com.au/story/0,25197,24719907-5006786,00.html
In a pretend hug, he disconnected something on her breathing apparatus and allowed her to sink to the bottom. Did nothing to help her despite his expertise as a diving expert.
“Are there any details on what he did to “murder” her? How did he actively take her life? “
Evidence is sketchy but they think he turned her air off and then turned it back on at the surface. She had air in her tank at the surface and her gear was working properly.