Now to the trial of blade runner Oscar Pistorius. Finally set to resume tomorrow. Six weeks after the judge ordered he undergo mental health tests. Lama Hasan has details from South Africa. Reporter:... See More
Now to the trial of blade runner Oscar Pistorius. Finally set to resume tomorrow. Six weeks after the judge ordered he undergo mental health tests. Lama Hasan has details from South Africa. Reporter: Good morning to you, Dan. In may, the trial was all set to wind down. Then the shocking turn. As his mental and emotional health began being questioned in court. The judge ordering Pistorius to have mental health checks. With these results set to come out, it's now make or break time in the case. Does Oscar Pistorius know right from wrong? I'm sorry, milady, I'm getting confused. Reporter: He's set to hear the results of his psychiatric evaluation Monday morning. Last month, the judge ordering the evaluation. A defense witness was saying he suffered from generalized anxiety order. When exposed to a threat, Mr. Pistorius is more likely to respond with a fight response than a flight response. Reporter: Perhaps explaining why he fired his gun. I did not fire at reeva. Reporter: The prosecutor going on the attack. If there had been another explanation, it was just lying. Reporter: This trial, which lasted much longer than expected has witnesses describing in chilling details the night of steenkamp's death. It was blood-curdling. It was something that leaves you cold. Reporter: And the olympic athlete grild on the stand. Your version is a lie. She wasn't breathing. Reporter: Now a team of psychiatrists and one psychologist are hoping to answer these critical questions. What was his state of mind when he killed steenkamp? The results could turn out to be a game-changer. While no one knows which direction this trial will go. We do know if the team of doctors agrees with the other doctor, this will help his case. Look, the bottom line here is that, I don't think there's any way that the judge is going to accept a finding that says that he can't understand right from wrong. I N't think the psychologists are going say that. The question is, will they say he's got some psychological issues? If they were to do that, that would only impact sentencing, not the actual trial. The more likely scenario is the group of psychologists are going say there's nothing. That psychologically, that should impact this case. We shall see. And the trial lasted a lot longer than expected. And another delay because one of the psychologists had a heart attack. They had to delay the results for two weeks. We're going to switch gears to "Gma" at the world cup.
This transcript has been automatically generated and may not be 100% accurate.