Who knows that the kid did to the dog? Maybe he poked it in the eye, or hurt it. Maybe he was wrestling with it. My point is this, you should never leave a kid(s) alone with any powerful dog. In regards to pits, they can be very aggressive towards other dogs if they are not properly sociliazed, but they are very tolerant of humans. Why would a dogfighter want a dog that attacked him every time he pulled the dog out of the ring? Pitbulls are no different than Dobermans, GSD's, Mastiffs and other powerful dogs. You need to bring them up correctly and you need to treat them with respect.
Infact, if trained correctly and brought up in a social manner, pitbulls are a very good family dogs. The problem is that all the lowlifes and morons in society are getting pitbulls and encouraging poor behavior out of them. Something tells me that James Harrison didn't take the time to properly raise his dog. You have a better chance of being hit by lighting than attacked by a pitbull, thats a fact.
This just as easily could have been a lab or a mutt. Most of the harshest pitbull critics have never owned one or been around one.