Open Doors (1990)

Tommaso Scalia is a man who commits three murders: he killed his superior who sacked him, he kills the man who replaced him, and he kills his own wife. He wants a quick trial and an early execution, but an earnest, principled assistant judge looks for a way to save the murderer from being shot, because he does not belive in capital punishment. Although he manages to save the man initially, he will pay a high price for it.