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.
As we continue in faith, we live by doctrine (pistis in the Greek refers to the initial saving faith to the unbeliever and to post salvation doctrine inculcated in the soul for the believer).
My response referenced the article you provided of an officer who shot an injured man, believing he was acting mercifully.
The Law directing us not to murder doesn't imply we are not to defend legitimate authority, where appropriate, by deadly force.
There are many who may be rather confused as to what action is appropriate when following the law you have provided who have not inculcated doctrine in their soul. Those believers who have not inculcated doctrine in their souls might also obey they law, but error in moral degeneracy by failing to act responsibly per the Word doctrinally.
In the case of the officer, he might have sinned by killing his fellow man by believing the death would lessen physical suffering, not realizing that in some situations the physical suffering might be a testing of the soul to remain faithful in the spirit.
In the case of Terri, a spectrum of faulty and confused reasoning has been presented from both sides justifying many positions. I suspect her situation is only understood by God, or might be simply a mystery to the angels.