Kids being kids behave irresponsibly and impulsively all the time. That much is understood. I could see this crime happening out of a moment of rage and AB lashed out at Elizabeth, but so many have alleged the gravesite was prepared days before, which makes it horribly premeditated.
There have been crimes like this for years, incomprehensible to normal people. The more I think about this one the more I recall murders being done by kids that seem to have some lack of empathy, not because of rage or impulse. I can remember a few that happened when I was a kid in Ohio, and then more recently in the news that awful murder of the two professors in NH 4 or so years ago... one of the boys had guilt and regret, but the other had none whatsoever, and he came from a loving stable family, was an honors student, etc. Also that awful senseless murder of that woman in VT a few months ago... one of the boys, the ringleader, just seems to have No guilty feelings or remorse.... also from a good family. I mean, look at Jeffery Dahmer, good family, but something was terribly skewed. It's odd to see girls do this, but I can think of some cases over the years. I can't help thinking that the Prozac might have pushed something over the edge for AB, I feel it's risky to give SSRI drugs to teens and children.