Let's go back to the original premise in post #1 referring to the once saved, always saved concept. I ask anyone here to answer this question.
If I declare Jesus Christ to be my savior and become saved, then start to murder, rape, and pillage the good folks of (I'm trying to think of a random city, how about Tokyo Japan) Tokyo, am I still assured of my salvation?
Setting aside the obvious flaws in your premise I can say that in the abstract if a saved person commits murder they are still saved.
Now I condition that on the truer premise that a genuinely born again person will not commit random acts of murder because they have the Holy Spirit to influence their behavior.
Truth is that just making a declaration is insufficient to save. Jesus said that no man comes to Him except the Father draw them. A man must come under the convicting power of the Holy Spirit of God to become saved.
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
John 16:7 ¶ Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
8 And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
9 Of sin, because they believe not on me;
10 Of righteousness, because I go to my Father, and ye see me no more;
11 Of judgment, because the prince of this world is judged.
Now what of you? Ever been drawn to Christ?
For the cause of Christ
Roger