[leonard]

In law there is a concept - a crime
The offense is a combination of objective and subjective attributes contained in the criminal law , which together define a socially dangerous act is a crime. Motive , purpose, strong-willed signs of its commission , etc. And if by chance , like, lost control . That , according to the classical jurisprudence - and it's not a crime ... .. Sometimes, even a temporary loss of skills (the head is dark object ) drove on people and time - as if forgotten . Can be seen - just as , by negligence . Although, of course a person's death is a tragedy.
The fact that Yao scored Zhang to death following an accident in order to abscond with her ​​murder. It's murder - the highest degree of severity !