Here is some wisdom from the Church you seem to want to ignore, as do those who espouse other novel teaching on this issue:
"Execution Of Criminals
Another kind of lawful slaying belongs to the civil authorities, to whom is entrusted power of life and death, by the legal and judicious exercise of which they punish the guilty and protect the innocent. The just use of this power, far from involving the crime of murder, is an act of paramount obedience to this Commandment which prohibits murder. The end of the Commandment is the preservation and security of human life. Now the punishments inflicted by the civil authority, which is the legitimate avenger of crime, naturally tend to this end, since they give security to life by repressing outrage and violence. Hence these words of David: In the morning I put to death all the wicked of the land, that I might cut off all the workers of iniquity from the city of the Lord."
The wisdom of the Church recognizes that Trent shouldn't be applied to this matter at this time. That's the real wisdom of the Church.
Another kind of lawful slaying belongs to the civil authorities, to whom is entrusted power of life and death, by the legal and judicious exercise of which they punish the guilty and protect the innocent.
Sorry, but the civil authority that allows O.J. Simpson and Robert Blake to walk, but incarcerates Martha Stewart and condemns Scott Peterson to death on the most circumstantial of evidence can hardly be described as judicious. The same civil authority that would starve Mrs. Schiavo to death? The generation of Churchmen currently applying their wisdom know full well the horrors the civil authority can inflict on a people and should be lauded for their courage to correct all the novelties that have come after Gen. 4:15.