Whose fault is it when children kill?

I recently read this article entitled "8 year old charged in baby's death". In essense, a 8 year old boy kicked, punched and beat his 7 month old sister with a 2 by 4. Someone asked the question "Where is God when stuff like this happens? He knows what is going to happen before it happens..."

In response to the question, here was my opinion on the subject:

God is always here but the devil will use whoever to do whatever! That is why it is important for adults (not just parents - the community) to start teaching children about God as early as possible. It is still a matter of free will to make the right decisions even in an child. We can't blame God only ourselves because He has given us the WORD to follow and we don't. God gave us permission to chastise our children but we don't because we say its wrong. But what does God say?

Proverbs 22:6 - Train up a child in the way he should go: and when he is old, he will not depart from it.

Proverbs 22:15 - Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.

Proverbs 23:13 - Withhold not correction from the child: for if thou beatest him with the rod, he shall not die.

Proverbs 23:14 - Thou shalt beat him with the rod, and shalt deliver his soul from hell.

Proverbs 13:24 - He that spareth his rod hateth his son: but he that loveth him chasteneth him betimes.

Proverbs 29:15 - The rod and reproof give wisdom: but a child left to himself bringeth his mother to shame.

So now we have babies killing babies. I guess if it upsets us, wonder how grieved God is???

What are your thoughts?