“Prosecutors contend Stutz saw Watson during the final scene
sic of a murderous act. They claim Watson turned off his wife's oxygen and let her lose consciousness or become distressed before approaching her again, turning on her air supply to cover up murder, and letting her sink.”
Honeymoon death: Key witness takes stand
I take it they realize that it was not possible Gabe could have murdered Tina in the short period of time that Stutz witnessed them together. Stutz is now claiming he saw Watson with Tina 'momentarily'. McFadyen records that Stutz has previously said he saw Watson approach Tina for 10-30 seconds. Momentarily sounds more like ten seconds, or less, than 30.
The idea that Watson could have tried to murder his wife by inducing a panic through momentarily cutting off her air supply while her regulator remained in her mouth is dubious. This latest story sounds even more contrived.
Start with a scenario that sounds at least like something that Gabe could have planned if he intended to murder his wife. I will describe this and other scenarios as if they did happen. At the start of the dive Gabe turned off Tina’s valve. He followed her as she sank to the bottom while dying. After she was obviously dead, he turned the valve back on.
The dive profiles generated from both Tina and Gabe’s computers are different to what you would expect in this scenario. Instead they correlate with the description of the dive given by Gabe. The graphs show that after Gabe left Tina at 15 m she drifted to the ocean floor because she was carrying too much ballast. Based on her dive watch profile, she fell from about 17 to 27 metres in a minute. Her rate of descent at the start of the dive is similar. If we assume this rate of descent as an average, that it would take three minutes for Tina to drown, and that Tina had a ‘passive’ panic attack after Gabe turned off her air so that she went into a free fall descent, Gabe would have had to turn off her air near the start of the dive and Tina would have been near the ocean floor when she drowned. The graphs clearly indicate that Tina did not go into a free descent to the bottom. Tina's descent down to 15 metres took over four minutes including periods when she leveled off. The graphs confirm that Gabe left Tina at about 15 m. He did not follow Tina to the bottom of the ocean and turn her valve on. The graphs show that Tina’s dive profile prior to the alleged 'final' encounter with Gabe is markedly different to that of the profile after the encounter when he swam away. In this scenario, the profile rate of descent should be similar both before and after the ‘final’ encounter. That is not what you see on the graphs.
If Gabe did turn off Tina’s valve at the start of the dive and she sank straight down, how did she end up at the location where Wade picked her up? And of course there is the question that if she was dead when Stutz saw her during this second encounter how come she was moving.
Suppose the prosecution chooses to shorten the time after Gabe turns off Tina’s valve from 3 minutes 1 ½ minutes to get around some of these problems. In this next scenario they have both progressed some time into the dive and 1 ½ minutes before Gabe ascends as shown on the graphs he turns off Tina’s valve before Stutz sees what is happening. Gabe allows her to die then turns the air back on at around the time he ascends. Aside from the problem that there is no witness evidence supporting the start of this scenario, there is an extended flat spot just prior to Tina Gabe leaving her for the surface and Tina sinking to the bottom. If she dies during this time you’d expect to see her lose significant depth prior to Gabe turning off her valve and then turning it back on and leaving. Keep in mind that after Gabe leaves she sinks to the bottom at a rate of 10 m per minute. Again her rate of descent would be the same before and after the encounter if she had died. Another problem with this scenario is that it is questionable whether Tina would die during this relatively short time. It seems much more probable that she would become semi-conscious. (Cont)