Boy Killed because he didn't go Potty

In Cinncinatti, Derris Smith a 18 year old has been charged as an adult. This man decided that he was so frustrated with the Four year old child that he swung the little boy against the wall to the point that drywall was stuck to the little boy's head and the wooden floor was cracked. the little boy then went unconcious and never came back to before dying four days later.
Smith is being held in the Hamilton County Juvenile Detention Center on $500,000 bond.

Now can somebody tell me what is going on in the worls that people are killing their own children. How can you get mad at a little four year old boy to the point that you slam his head against the wall. That is a damn shame and you know it