From a reader:

Jonah–
Speaking of expanding the death penalty: What, ethically and morally, is the difference between attempted murder and successful murder? We recently had a case in Illinois where a woman was brutally beaten and left for dead in a dumpster. She was miraculously found; the woman was so cold she had to have all her toes amputated. Her ex-husband has been charged with the crime. Why shouldn’t he be eligible for the death penalty?
I think there is something in the Torah about intent that supports this notion.