Pretoria , South Africa ( CNN ) -- As it entered its second week , the Oscar Pistorius murder trial turned into an episode of `` CSI , '' replete with gory autopsy details and photographs of the crime scene . Even the bathroom door through which he shot his girlfriend , Reeva Steenkamp , was reassembled and put up in court . Drama from the trial came from a police expert swinging Pistorius ' cricket bat at the door in court to try to determine whether he was wearing his prosthetic legs when he did it . It came as well from detailed descriptions of the damage hollow-tip bullets do to human flesh . And then , of course , there was the effect of the evidence on Pistorius himself , who spent hours vomiting as he was forced to relive seeing Steenkamp 's mortal wounds . The sprinter admits that he killed Steenkamp , his 29-year-old girlfriend of about four months , on Valentine 's Day 2013 but says it was a terrible accident , not premeditated murder . Pistorius , 27 , is pleading not guilty to murder and three other weapons charges . Prosecution and defense battled all week over the meaning of four types of evidence . One : The autopsy . Steenkamp died of multiple gunshot wounds , including one that passed through her brain from above her right eye to the base of her skull , pathologist Gert Saayman testified . That wound was probably almost instantly fatal , he said , but either of the two other bullets that hit her in the hip and the right arm could have been fatal on their own , he said . She also had a wound between the fingers of one hand , he explained . The angle of the bullet that fractured her skull suggested she might not have been standing when she was hit , Saayman said . The bullets that hit her were hollow-tipped , designed to cause maximum tissue damage , he testified . Steenkamp was wearing Nike shorts and a black sleeveless top when she died , Saayman said . There 's no dispute that Pistorius fired the bullets that killed Steenkamp through his bathroom door , so the most important area of debate from the autopsy was the state of food in her stomach . Saayman said it suggested she had eaten about two hours before she died , which contradicts Pistorius ' version of events that they had been asleep in bed for hours before the killing . Pistorius ' defense lawyer , Barry Roux , fought tooth and nail to cast doubt on Saayman 's finding about the stomach contents , but Saayman gave no ground . Two : The door . The actual door through which Pistorius fired the bullets into Steenkamp was on display in court for much of the week , a mock-up of the toilet room behind it . Four bullet holes and several other marks in the wood were clearly visible . Prosecution and defense disagree on whether Pistorius put his legs on before or after bashing the door with a cricket bat to get to his girlfriend . Police forensic analyst J.G . Vermeulen testified that the angle of the bat marks in the door indicated Pistorius was still on the stumps of his legs at that point , demonstrating in court the angle of the swing . But the defense disputed his version , with two lawyers from the Pistorius team taking their own swings at the door during a break , then making Vermeulen swing on the door from his knees . Vermeulen insisted that the stances the defense made him adopt were `` unnatural , '' to which Roux responded : `` Unnatural for you . '' There was also discussion of another mark in the door that Vermeulen said was not from a cricket bat . The defense says it 's where Pistorius kicked the door with his prosthetic leg before going for his bat . Vermeulen said that was a possibility but refused to accept it was the only explanation . He said he had not tested the mark because his assignment had been only to check the cricket bat marks . There was also discussion about footprints that appeared on the door in some photos but are not there now . Vermeulen said they were consistent with police shoes . Roux used their disappearance to suggest the door had been handled sloppily by police -- stepping on it when it was on the floor and later wiping the marks off -- to cast doubt on its reliability as evidence . Three : Police photos of the house . The court saw more than 150 photos of Pistorius ' house taken by police in the hours and days after Steenkamp was killed , showing shocking images including a blood-spattered toilet and the Olympian 's gun , still cocked , on a blood-stained floor . The position of several key objects could help determine whether Pistorius is telling the truth about the events leading up to Steenkamp 's death . Attention focuses on the position of spent bullet cartridges on the floor , two iPhones and the fan that Pistorius says he went out onto his balcony to get before the heard the noise which he thought was a burglar . The photos also show the trail of blood from the bathroom to the lower floor from when Pistorius carried Steenkamp 's body down the stairs . Four : Phone records . Pistorius and several of his neighbors made calls to security in the minutes after the shooting . The record of the calls between about 3:15 and 3:22 a.m. have helped establish a timeline of events , even as witnesses dispute who called whom and when . Ex-police commander 's testimony aids defense .
Gory autopsy details and photographs of the crime scene appear at the trial . Oscar Pistorius is charged with murder in the slaying of his girlfriend , Barbara Steenkamp . He says her shooting death was an accident , not premeditated murder . The front door through which she was shot was reassembled in court .