Let the parents of the dead child decide the sentence! Personally I dont care what age you are, if you kill someone that you went out of your way to go find and kill, then that is premeditated murder. This is not some act committed in anger at the spur of the moment. It requires the death penalty. I saw a case come up like this where a GI raped a girl in Korea and the parents nailed the man to a telephone pole till he died or some such thing. The police did nothing to help. Sometimes a little vigilante justice is what is called for.