Some criminals like this are able to be rehabilitated. Amy Fisher comes to mind. She seems to have done well since getting out of prison.
I don't know if is the help some receive behind bars, or their own will to change. Sending a 9 year old to prison for her entire life is extreme (in my opinion anyway). The reason for this tragedy needs to be found and she needs to be helped.
What she did is absolutely horrible, I am not saying it isn't. But I do feel a life sentence is over the top.
It is as bad as that 35 year sentence the guy got for stealing a b/w tv back in the 70's.