I really don't see how God's will figures in this fight to save Terri. God is not putting her to death. It is His will that she live. It is very sinful men destroying her, with the tacit understanding of the intelligentsia, elected leaders, and the people as measured in opinion polls. So really, most people in one way or another will be responsible for her death, not God. It's not His idea at all, and He does not usually immediately stop evil men from carrying out their misdeeds.
Unless obedient, faithful, praying people petition Him. There are many many instances in His book that tell of evil being thwarted because His people were obedient, faithful and because they prayed.
In a way, how we deal with people like Terri is more like a test than anything else. Some of us are passing it with flying colors...others I know are not.
God generally does not do large-scale miracles in this day and age. The physical parting of the Red Sea goes a bit beyond His usual style these days. His style tends more toward small mircales with big effects. Keeping Terri alive long enough to expose the evil forces that have been trying for years to murder her. Hardening the hearts of some evil people so they make mistakes, while softening the hearts of others; that sort of thing.
I heard them say about 1/2 hour ago that they were told that was the end of the evening for the guys working on the case, that it was over for the night. Maybe because of the backpack threat.
The fact it's lasted as long as it did could be hopeful. Last time Wittewhatever made his entire de novo decision of all the information within 1 1/2 hours