Blade Runner Trial: Can Pistorius' Case Be Saved?

Oscar Pistorius defense team looks to come back from the ferocious cross-examination.
3:44 | 05/02/14

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Transcript for Blade Runner Trial: Can Pistorius' Case Be Saved?
That's ahead. We begin this half hour with Oscar Pistorius. His trial set to resume after a two-week adjournment. The question now is if Pistorius' defense team can bounce back from his cross-examination. Matt Gutman has the story. Reporter: Pundits have declared Oscar Pistorius' case all but doomed after he got pummeled in cross-examination last month. I killed reeva steenkamp. Reporter: But this morning, sources close to the defense tell ABC news, the heart of their case hasn't even begun. They could have 11 additional witnesses in 2 weeks of testimony. First up, in this south african courtroom, likely a ballistics expert, who could explain Pistorius' version of how he shot his girlfriend, the model and reality star, reeva steenkamp, last year. Also, expected, a forensic audio expert, likely to convince the judge, that ear witnesses may have mistaken gunshots for cricket bats. And Pistorius' scream for a woman's. Pistorius has pleaded not guilty and spent the last three weeks recuperating and resting, after the mauling by gerrie nel, who spent five days sinking his teeth into the blade runner. Your version is so improbable, it cannot be reasonably possibly true. Seeming to trip him up about the night he killed his girlfriend. One of the thing Hess did was catch him in inconsistencies that we hadn't heard before. We knew that Oscar Pistorius fired the four bullets into this door, killing reeva steenkamp inside. But Pistorius seemed to change his testimony when grilled by prosecutor nel, saying his gun just went off that night by accident. While nel got Pistorius to break down. I don't have to look at her picture. I was there. Reporter: Can his defense hold up his story? For "Good morning America," Matt Gutman, ABC news, Miami. ABC chief legal affairs anchor, Dan Abram, is here with much more on this. The defense indicating they're just getting started. Come on. Just getting started? This isn't a case about whodunit. He admits he did it. The most important question is why? All of the other witnesses will be interesting and they're going to be relevant. And the defense hopes they're going to poke some holes in the prosecution's theories, et cetera. But the bottom line is, the heart of this case has happened already. It was Oscar Pistorius. And the rest of these witnesses, I think, are going to be just additional information the defense hopes lead to reasonable doubt. What do they do then? The best thing they could have is someone who literally backs up Oscar Pistorius' account. Is there a neighbor, instead of offering an account that helps the prosecution, helps Oscar Pistorius? A neighbor that believes there were screams is and a cricket bat, as opposed to bullets? It would be useful for them, if there was someone beyond a ballistics expert, who could say yeah. The problem is that's going to be hard to find. If they don't have their own ear witnesses. Then it's Oscar Pistorius. The next 11 witnesses or so are going to be there to try to back up his account, with regard to the angle of the bullets and how it happened, et cetera. But it still comes down to his account, right? All of these witnesses are there to bolster his account. And that still becomes the most important point. And if he blew it already, maybe a tough spot for the defense. Does this break benefit either side? I don't think it makes much of a difference.

This transcript has been automatically generated and may not be 100% accurate.

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