Indeed so, but if he was proven to have caused Terri's initial collapse, I think his later actions could be easily shown to be a murderous coverup.
Maybe so! Man, this one strains legal theory, though, doesn't it? The first try was sort of an accident, then at the end it was mercy killing....... But let's look deeper.
If my theory of Terri's injuries is right, and if Carla Iyer's observations are correct that he tried to kill her with insulin as many as five times, plus we all know about the time in 1993 he tried to withhold life-saving medicine -- that is up to seven covert efforts to kill her. Then we had four open and legal efforts to kill her with court permission.
Eleven attempts at her murder!
I think the question of premeditation is pretty well solved :-)