I'd like to know more about his previous behavior, too. I mentioned it in my first post. I mean, I wonder why he was chained up in his own backyard? Maybe it wasn't fenced in, but, I was under the impression that it was, just because the children were left unsupervised. It just seemed odd to me that the dog was chained up on top of being in a secure area. Unless he was an escape artist and was always getting out of the yard. All I can say is, if those parents had even an inkling of an idea that their dog may be agressive, then shame on them. and, what guilt they'll have to deal with, if that's the case. Ugh. I'm giving them the benefit of the doubt, though, because I don't know them or their dog, but, I wish there were some way we could get more information. I'm just sorry that that had to happen to all involved, including the dog that had to be killed. It's just sad all around.