( CNN ) -- Video of Oscar Pistorius re-enacting how he says he killed his girlfriend was illegally obtained by the Australian television network that aired it Sunday , a lawyer for the former Olympian said . The network says that is n't so . Channel Seven 's `` Sunday Night '' included the video in an hourlong report on the case against Pistorius , who is on trial for murder in the February 2013 shooting death of Reeva Steenkamp . Pistorius , 27 , admits firing the bullets that killed Steenkamp , but he says he mistakenly thought he was defending himself from an intruder . Prosecutors say the two had an argument and he deliberately murdered the model and law school graduate , who was 29 . The video shows the disabled athlete walking on the stumps of his legs -- without his prosthetics -- while pretending to aim a handgun . Pistorius is also seen with his prosthetic legs , carrying his sister down a set of stairs , which is intended to demonstrate how he says he carried Steenkamp . There was no comment in court about the video during the trial Monday . Prosecutor Gerrie Nel seemed to be trying to bait a witness into mentioning it , which could have opened the door to having it admitted in court , said CNN legal analyst Kelly Phelps . But the witness , South African Paralympic team doctor Wayne Derman , did not refer to the video . After his testimony , lead defense lawyer Barry Roux indicated that he planned to close his case but wanted to consult Pistorius first . Judge Thokozile Masipa adjourned the court until Tuesday morning , when the defense is expected to rest . Video map of events . The video was produced in October by a U.S. company hired by his defense team to help `` visually map the events on the night of the accident '' in preparation for the trial , Pistorius lawyer Brian Webber said in a statement to CNN . The company , The Evidence Room , used the video to produce a `` forensic animation '' of the fatal events , Webber said . The defense never introduced it into the ongoing trial . `` We wish to make it very clear that the material that has been aired was obtained illegally and in breach of the nondisclosure agreement with The Evidence Room , '' Webber said . `` Its usage also constitutes a breach of privilege as this material was produced for trial purposes on the instructions of a commissioner , and the ownership of the copyright vests in the commissioner . No permission for the disclosure thereof has been given . '' CNN reached out to representatives of The Evidence Room for comment Sunday , and a representative responded Monday that `` there will be no comment at this time pending the conclusion of trial . '' The broadcast included an interview with Scott Roder , the investigator who produced the video . Webber accuses the broadcaster of illegally purchasing the video and of violating a promise not to air it until after the trial is concluded . The broadcast of the material is `` a staggering breach of trust and an invasion of the family 's privacy , '' the lawyer said . `` Whilst we can not imagine how any of the footage would not support Oscar 's version , we will only be in a position to comment further once we have had the opportunity to study what has been aired , '' he said . 'Heart of the case ' Mark Llewellyn , the executive producer for `` Sunday Night , '' issued a statement defending the use of the video . `` We would not have run the footage if we thought we had obtained it illegally , '' he said . `` The material shown on Sunday Night goes to the heart of both the prosecution and defense cases , including the account provided by Oscar Pistorius . '' The video included Pistorius putting on his prosthetics to show how quickly he could do so after firing the gun . He is also shown rushing across the floor on his stumps when prompted , to demonstrate how fast he could move without his prosthetic legs . At the trial 's conclusion , the judge will have to decide whether Pistorius genuinely made a mistake or deliberately murdered his girlfriend . If Masipa does not believe the athlete thought there was an intruder , she will find him guilty of murder and sentence him to a prison term ranging from 15 years to life . South Africa does not have the death penalty . If Masipa accepts that Pistorius did not know that Steenkamp was the person he was shooting at , she could find him guilty of culpable homicide , a lesser charge than murder , or acquit him , according to Phelps , the CNN legal analyst . A verdict of culpable homicide would leave the sentence at Masipa 's discretion . CNN 's Robyn Curnow , Edwin Mesa and Carma Hassan contributed to this report .
The defense expects to rest Tuesday , lawyer Barry Roux says . Oscar Pistorius re-enacted his version of shooting on video . The athlete is accused of deliberately shooting his girlfriend , Reeva Steenkamp . He says he shot Steenkamp accidentally in his bathroom , mistaking her for an intruder .