Where will Pistorius' trial take place?
Despite being South Africa's lower courts, regional magistrates' courts can hear all criminal cases barring treason, so it is possible that Pistorius could be tried in such a court.
However, Grant said the high court, which hears cases deemed too serious for magistrates' courts, could be in a better position to hear Pistorius' case.
"Given the interest in this and given the possible sentencing that might follow -- if it is established that this is premeditated -- the high court would be in a better position to hear it and to sentence," he said.
A high court trial could take place before a single judge or before a judge and two lay people, who are usually legal experts such as advocates, academics or retired magistrates, who are known as "assessors." These assessors are restricted though to answering questions of fact.
Their role is to advise the judge, who is not obliged to follow their guidance on questions of law, but they may overrule a single judge on questions of fact.
When will Pistorius' trial begin?
Some high-profile or important cases in South Africa have been fast-tracked and pushed through within a month, but that is "highly, highly exceptional." What is more likely, said Grant, is that the trial would get under way within about six months.
How long is it expected to last?
If the trial follows an ordinary course, Grant said, he would expect it to last four to six months -- but that would depend on how aggressively the defense challenged the prosecution case.
"They could dispute everything, in which case there could be 'trials within trials,' " he said.
But he said the defense would have to balance that "against not appearing to challenge things for the sake of it" and alienating the court.
Grant's understanding is that there are few witnesses that could be called -- neighbors among them -- but that if character was to be raised as an issue, "it could cause an explosion of witnesses."
"It could just drag on forever."
What about appeals?
If the trial is heard in a magistrates' court and Pistorius is convicted, he could potentially appeal from the magistrates' court, to the high court, to the supreme court and even eventually to South Africa's constitutional court.
Can Pistorius get a fair trial?
If the initial court did not give him leave to appeal, he could petition South Africa's chief justice for permission.
The right to appeal depends on whether, based on the facts of the case, the initial judge or magistrate believes a different court could possibly reach a different verdict.
South Africa's highest court, the constitutional court, used to be only for cases regarding constitutional matters, but a recent act of parliament broadened its remit.
What are the sentencing guidelines for premeditated murder?
For premeditated murder, the mandatory sentence in South Africa is a life sentence, which in practice is 25 years unless someone can prove extraordinary circumstances.
Extraordinary circumstances could include a combination of number of factors: for example, that it was a first offense, the age of the person and in Pistorius' case, his disability and the impact this could have had on his actions.
However, Grant said if the court accepted the prosecution's case -- that Pistorius chased Steenkamp into the bathroom and "hunted" her down -- his defense team would be hard-pressed to convince the court that there should be any considerations that should override the repugnance that should be felt.
What happens if Pistorius is found not guilty of premeditated murder?
If Pistorius faces trial for premeditated murder but is found not guilty, he would face a "competent verdict" or lesser charge of culpable homicide, which is based on negligence.
Pistorius is not claiming self-defense; he is claiming to have been mistaken about his need for self-defense. He is denying that he intentionally unlawfully killed Steenkamp.
Grant said the defense boiled down to Pistorius saying "I made a mistake."
If the court were to rule that the mistake was unreasonable -- based on what an objective, ordinary South African would do in the circumstances of the accused -- he would be found guilty of culpable homicide.
Grant said he would expect a court to probably conclude that it is unreasonable to fire at anybody through a closed door regardless of whether they were an intruder, because of the value of human life.
"I'm expecting that if he beats the murder charge, he is in very grave jeopardy of being convicted of culpable homicide," he said.
What would the sentence be if Pistorius were convicted of the lesser charge of culpable homicide?
If Pistorius is convicted of culpable homicide, no minimum sentencing legislation would be triggered. "Courts are able to exercise their complete and ordinary discretion," Grant said.
This means, theoretically, Pistorius could get a non-custodial sentence if convicted of culpable homicide. Grant said there had been examples of people killing a loved one accidentally where they had avoided jail.
If, however, the court took a view that Pistorius had been grossly negligent, Grant said, he would guess the runner could be jailed for up 15 years.