"So you're proposing that the physical punishment you inflicted on the boy fixed his "sociopathic" tendencies?"

Wow, where did that come from? The post implied no such thing. And good luck using any method under the sun to fix personality disorders such as that of the sociopath.

"We don't use physical punishment on adult murdering sociopaths, nor should we inflict it on children."

Actually there is a lot of similarity between physical punishment and, say, locking a person in a small steel cage with no window for twenty years. Indeed, if I were to do something criminal, pretty sure I would prefer the brief swat over my clothes over the course of three seconds (like the boy in the above narrative) than, say, being locked in a small steel cage with no window for twenty years. So maybe our jails ought to be banned, they are obviously worse than a brief spanking. 

Indeed, maybe in 500 years, our more advanced fellow citizens will look back in horror at the vindictive depravity of jail.