So they were in a dentist's office at the same time? Good grief.
So then he hatched a plot to somehow deprive her brain of oxygen for some minutes, leaving her in a PVS for 15 years, and finally prevailed through the courts, just so that he could now marry her?
Delusional.
Delusional.
Yes, your theory is delusional. Don't you think it's more likely that he just wanted her dead immediately, rather than have her in a PVS for 15 years?