Intentions and actions which a person chooses may be mitigating factors, but the effects of their actions are what really matter. If I run over someone with my car, I could be guilty of negligence, manslaughter, or murder/attempted murder. However the most relevant, constant, and objective fact is that I seriously injured/killed someone.
Judging solely in consequences of an action is dangerous in that someone could do something, as innocuous as scratching their nails on lockers; but then some poor soul in the hallway has some kind of stress related epilepsy, their parents abuse them and scratch nails on chalkboard as a kind of assault on her nerves. She hears what should be a homebound horror at school, starts to panic thinking her parents are there at school, stress->seizure->fall->die. Does the boy go to jail for manslaughter?