If the OP was, Do christians stumble ?, then the answer is a simple yes,
of course we do, we are not perfect just forgiven. We try but we often fail and if anyone tells you otherwise I think they are either Jesus or they have a short memory.
To the extent of murder, how can we ever tell, I mean how would I react if my granddaughter had been abducted and abused and I was the first one to find the abducter?
Very often and I can only speak for myself I say "there but by the Grace of God go I."
And we are told in:
1 cor. 10:13
the temptations in your life are no different from what others experience. And God is faithful. He will not allow the temptation to be more than you can stand. When you are tempted, he will show you a way out so that you can endure.
I believe he keeps his side of that bargain but there must be times when for whatever reason, be it weakness, anger or our own deliberate fault etc. we do fail and we will have to live with the consequences and the punishment.
The only difference is that if we repent with a broken and contrite heart God will forgive us because Jesus paid the penalty of all sin with his death on the cross.
The prayer below is never far from my heart because when I think I am doing well I very often fall.
O Changeless God,
Under the conviction of the Spirit I learn that
The more I do, the worse I am,
The more I know, the less I know,
The more holiness I have, the mores sinful I am,
The more I love, the more there is to love.
O wretched man that I am!
I have a wild heart
And cannot stand before thee;
I am like a bird before a man.
How little I love thy truth and ways!
I neglect prayer,
By thinking I have prayed enough and earnestly,
By knowing thou hast saved my soul.
Of all hypocrites, grant that I may not be an evangelical hypocrite,
Who sins more safely because grace abounds,
Who tells his lusts that Christ’s blood cleanseth them,
Who reasons that God cannot cast him into hell, for his is saved,
Who loves evangelical preaching, churches, Christians, but lives
My mind is a bucket without a bottom,
With no spiritual understanding,
No desire for the Lord’s Day,
Ever learning but never reaching the truth,
Always at the gospel-well but never holding water.
My conscience is without conviction or contrition,
With nothing to repent of.
My will is without power of decision or resolution.
My heart is without affection, and full of leaks.
My memory has no retention,
So I forget so easily the lessons learned,
And thy truths seep away.
Give me a broken heart that yet carries home the water of grace.
Taken from The Valley of Vision edited by Arthur Bennett