Murder is anything but ambiguous. If he shot at an intruder, intending to cause that intruder's death, it's murder. If he shot, not intending to kill anyone, but could have foreseen his actions could have resulted in someone's death, it's still murder.
The options on the table are not premeditated murder OR culpable homocide. SA doesn't recognise a separate and specific charge for premeditated murder. Instead, premeditation is used as an aggravating factor. So, it will simply be determined if the intent was there to kill Reeva, an intruder, or he should have foreseen the consequences of his actions.
If the court finds he intended to kill Reeva, murder is a done deal. Intending to kill an intruder - done deal too unless the panel believes his defence. And the last, proving intent by using dolus eventualis, will be considered only if they believe his defence. Then the reasonable person test will be used to determine intent.
Culpable homicide will not even be contemplated until the issue of murder is resolved.
His disability, IF it is considered, would not be (until sentencing) if they believe Oscar intentionally killed Reeva or an intruder.
Please pardon errors as posted via Tapatalk with a less than stellar user.