If the courts could be guaranteed to get their act together and not convict the wrong person, I would say "go for it".
All too often in this country, a person sentenced to "life" for murder walks free after just ten years of imprisonment.
That surely cheapens human life.
However, our courts are almost by-words for incompetence, so I do have reservations about entrusting the judicial system with making life and death decisions. It would be just like them to send the wrong person to the gallows!