Still, this child has no repeat history that we know of, and probably wasn't reprimanded for his behaviour before. It is likely that he could be a psychopath with everything he said, but it is also likely that the veil of anonymity made him less sympathetic to the human plight of his victim, just as we all take what we see on the internet with a grain of salt.
EDIT: Ok, maybe not really a child, but in the eyes of the law you might as well consider a minor a child. However, I sure know few hackers who exploit their status as a minor as best they can to avoid legal consequences.