"...write a novel from the perspective of Terri." There are a number of problems with this concept.
1) One would be seen as trying to "cash in" on the tragedy.
2) It presupposes something that has been argued to death, (excuse the phrase), and not resolved -- whether Terri had awareness of her surroundings.
3) It is terribly depressing. I would have difficulty dealing with my emotions before I had completed six chapters.
4) No one would believe that human beings could be so venal and cruel.
5) Terri's perspective is surprisingly limited. Even assuming she had full cognitive function, she was kept well out of the loop of information. Although the very epicenter of everything that was happening, she was always the last one to know.
6) The more I learn about this, the angrier I get. This is not good for my mental health.
The only way I would touch a literary project like this would be if I could re-write the ending, a la "The Lovely Bones", where a terrible tragedy is the beginning of the story.
Then I would relate how the worms of karma and hubris would conspire against the conspirators, and how every effort they make after this dreadful act of vindictive malevolence would prove futile and negative.
I would bring them locusts of bad luck, plagues of annoying coincidences, and floods of assailing doubt and regret. Bad dreams would be their every somnolent companion.
Their financial endeavors would fall to ruin, their friends and families would abandon them, their health would fail. Their "Lot" in life would become one of abject misery and pain.
And they would know, beyond doubt, where this tribulation got its start. From their ghoulish and parasitic decision to milk every drop of goodness from an innocent girl.
won't even consider it, huh? I'm sure your next novel will be intriguing, whether this or anything else you choose to write about.