My question, vis-a-vis, no death penalty unless he killed someone, is what is the thinking behind mitigating the penalty just because he wasn't entirely successful....? I'm convinced that the attempt was to kill the victim.
Prove it. Punching someone in the head is rarely fatal.
As far as your question, you'd have to ask the Pennsylvania legislators who passed the statute enacting the death penalty as a sanction.
Pennsylvania - 18 Aggravating Circumstances - Death Penalty - ProCon.org
It appears that you'd like a wider application of death penalty laws, to expand it to cases of assault and battery committed by teenagers? Have you considered the financial implications of your plan?
1. Certainly not very difficult:
"NC3 UPDATE: On July 14, 2012, an autopsy was conducted by the Humboldt County Coroner's Office to determine the cause of death. They determined Morris' death was a result of blunt force trauma, causing a fracture to his skull. This particular fracture was large and traveled from below the left ear over the top of the head to below the right ear.
According to the Coroner's office, the fracture was a crushing injury. However, they say there were no other noticeable signs of trauma to indicate conclusively that Morris was the victim of an assault.
The Eureka Police Department is investigating the matter as a suspicious death at this time. Anyone with information is asked to call the detective's office at (707) 441-4032."
Cause Of Death Determined; Assault Victim Now Suspicious Death | News Channel 3
2. "The mental state of the perpetrator can also push an assault from simple assault to aggravated assault. If he or she acted with the intent to cause severe harm or fear of severe harm, an assault can become aggravated. Depending on the state, reckless behavior can also constitute aggravated assault for example when someone acts with reckless indifference to human life, but without the specific intent to injure any particular person. If a dangerous or deadly weapon is involved, an assault may become aggravated even without any specific intent to injure."
Aggravated Assault - FindLaw
a. "A person is guilty of aggravated assault if he . . . (a)ttempts to
cause serious bodily injury to another, or causes such injury
purposely or knowingly or under circumstances manifesting
extreme indifference to the value of human life recklessly causes
such injury."
http://www.judiciary.state.nj.us/criminal/charges/assault2.pdf
3. Let's make clear that the major difference between your position and mine is not the resultant death....as I have just shown that the attack can result in same.....but the priority given to the victim vs. the perpetrator.