I just happened to come across this reader comment regarding inferred intent on Prof. Grant's blog. Might be helpful:
http://criminallawza.net/2014/09/13/pistorius-remains-in-jeopardy-of-a-murder-conviction/
Mark S. says:
September 13, 2014 at 21:28
INFERENCE OF SUBJECTIVE INTENT
"We are required to infer Pistorius subjective intent, but we have to do this by means of objective criteria.
The objective fact is that he fired four aimed shots with hollow nosed bullets, all of which hit a person. From this we can only infer that his subjective intention was to kill that person. There is no other reasonable conclusion.
He says that he made a mistake as to the identity of that person. He thought that there was an intruder, but it was actually Reeva. In other words an error in persona.
We then have to consider a further question of subjective intent. Did he believe that he was lawfully entitled to kill the supposed intruder in self defense? (Putative private defence)
He would only be entitled to do so if he was clearly in danger of death or serious harm. Objectively he was not, since there was in fact no intruder. He knew the law as to the circumstances in which he was entitled to fire on an intruder, because he had passed a written exam for a firearm licence which asked that question. He had also had time to consider his circumstances, since by his own account he advanced slowly and cautiously toward the bathroom holding his firearm in his hands. He said that he then heard a noise in the bathroom. Objectively this is not a sufficient reason for him to believe that his life was immanently in danger.
We cannot reasonably infer that he thought he was lawfully entitled to kill the supposed intruder. Therefore his intentional killing of the supposed intruder was murder.
This is not affected by the error in persona, according to SA law. If you intentionally kill A, thinking that you are killing B, it is still murder in law. The fact that it was Reeva in the bathroom, and not an intruder, is irrelevant, because killing an intruder would have been murder too.
This was not considered or dealt with by Judge Masipa, and therefore there is a legal error in her judgement."