Read the doctrine contained in the following post,..it explains to the believer why human intervention in death isn't appropriate,...in the case you've cited, the officer will now undergo a judgment seat review for his decisions and actions before the Lord. If the person he killed, hadn't yet accepted Christ in faith, then the execution merely prolonged a living condemnation towards promoting and eternal condemnation of that soul. Hardly a compassionate, humane, action to eliminate misery.
http://www.freerepublic.com/focus/f-religion/1357792/posts?page=1068#1068
I don't care about some doctrine that man promotes. I care about the word of God. This is His Word.
Exd 20:13 Thou shalt not kill.
Mat 25:44 Then shall they also answer him, saying, Lord, when saw we thee an hungred, or athirst, or a stranger, or naked, or sick, or in prison, and did not minister unto thee?
Mat 25:45 Then shall he answer them, saying, Verily I say unto you, Inasmuch as ye did [it] not to one of the least of these, ye did [it] not to me.
Terri was murdered. If you share it that, may God have mercy on your soul.