That would be because none of the shots were instantly fatal...
We keep editing our pots and replying with our answers all out of order. lol
Directly from the article:
"Around 1 a.m. Thursday, a woman heard an intruder break into her home at the end of a quiet neighborhood street. She called her brother, Jeffrey Giuliano, who lives next door on Meeting House Hill Circle. He came over with protection for his sister - a handgun."
So again, if you say this kid did nothing wrong then you definition of wrong is very odd.