Having motive to kill someone doesn’t prove you did it. But statistically, those with motive are much more likely to be the killer than a random person. That narrows the probability. Likewise, lying about where you were at the time of the murder (which is what #4 is about) doesn’t prove you committed it, but makes it more likely. Those compund—each additional fact narrows the probability that the accused is not guilty.
If you take a random sampling of 100 situations where there exists facts similar to this case, I think you’d find that 95%+ of the time the accused really did commit the murder. That’s all that’s required.
That's 5 innocent people sentenced per hundred people to death/prison for a crime they didn't commit.
That is a lot.
In many cases for the innocent, the trial itself is a big punishment.
Jeffrey committing the murder doesn't follow from 1) 2) and 3)
Regarding 4) its still hazy as every one's recovery time could be different. Granted it won't be 100 days or something like that, but four days is still touch and go.
Law et al aside. How do Judges rule in this case? There is huge chance of getting this wrong, and how do you live with this thing on our conscious that you would have sent an innocent man to the gallows?