Documents Leaked in Oscar Pistorius Case

Documents could reveal how prosecutors are making their case against the Olympian.
3:00 | 02/21/14

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Transcript for Documents Leaked in Oscar Pistorius Case
All right, we turn to news about another olympian. Shocking new details in the murder case against Oscar Pistorius accused of killing had is girlfriend last year. This morning new documents reveal how prosecutors may make their case against him. It is unclear how the documents got out. As both the defense and prosecution deny leaking them, ABC's Linzie Janis has the story. Reporter: With his murder trial set to begin in less than two weeks, the case against Oscar Pistorius may be taking a stunning turn. The south african news network enca says it's obtained documents which reportedly indicate the prosecution is backtracking on key parts of its case. The state has always maintained that Pistorius and steenkamp -- Hi, my name is riva. Reporter: -- Were arguing when she ran to the bathroom then in an act of premeditated murder prosecutors allege Pistorius took the time to put on his prosthetic legs, grabbed his gun from under the bed and went after steenkamp firing four times through the bathroom door killing her. Pistorius has pleaded not guilty, said he had mistaken his girlfriend for an intruder and that he was not wearing his prosthetics and this morning, the news network claims that these freshly leaked documents so that the state's own ballistics expert has backed Pistorius' claim, that he wasn't wearing those artificials legs when he shot steenkamp and fired from a distance of about two feet, not the five feet police had originally said. This is a premeditated murder, whether he has them on or he doesn't is actually irrelevant. It's really can they prove intent. Reporter: According to enca, the prosecution still intends to argue Pistorius preplanned steenkamp's murder. For "Good morning America," Linzie Janis, ABC news, new York.

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

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