Detective testifies against Pistorius - FT.com A South African detective on Wednesday told a court that Oscar Pistorius, the Olympic sprinter facing murder charges, knew he was shooting at his girlfriend, who died of multiple gunshot wounds at his house last week. Mr Pistorius, who appeared in Pretoria Magistrate's Court for a second consecutive day, said in an affidavit on Tuesday that he mistakenly shot Reeva Steenkamp through a locked toilet door at his home in the early hours of last Thursday after believing an intruder had entered his house. But as a bail hearing continued, Hilton Botha, a lead detective on the case, told the court that there were witnesses who heard screaming and gunshots, and "nonstop shouting" before the fatal shooting. "I believe he knew she was in the bathroom and he shot four shots in the bathroom and killed her," Mr Botha said. The detective also said that Mr Pistorius illegally possessed .38-calibre ammunition in a safe in his bedroom. Mr Pistorius admitted on Tuesday that he kept a 9mm pistol under his bed, but police said he did not have a licence for a .38-calibre weapon. The prosecution is arguing that the shooting was a case of premeditated murder. Mr Pistorius has denied the allegations and in his affidavit said he had no intention to kill his girlfriend. But Barry Roux, a defence lawyer, attacked Mr Botha's testimony. He also said that alleged testosterone found at Mr Pistorius's house in Pretoria was a herbal remedy and not a banned substance. Steenkamp was hit in the head, arm and hip after Mr Pistorius fired four shots, one of which missed her, according to the prosecution. In his affidavit, Mr Pistorius said that after waking up in the early hours he heard noises in the bathroom and thought an intruder was in the house. He said he was not wearing his prosthetic legs, but grabbed his pistol and fired into the toilet. It was only when he returned to the bedroom, that he realised Steenkamp was not in the bed. He then put his false legs on and smashed open the toilet door inside the bathroom with a cricket bat, the affidavit said. He then carried her down the stairs to seek help but she died in his arms, his statement said. The prosecution, however, argues that he put on his prosthetic legs and walked 7m before shooting through the toilet door. Police arrived at the scene at about 4am on Thursday to discover Steenkamp dead. Mr Pistorius was arrested and charged by police later that day. Mr Pistorius, who is nicknamed the Blade Runner because of the carbon prosthetic legs he runs on, made history last year when he became the first double-amputee athlete to compete on the Olympic track, the semi-finals of the 400m, after fighting for his right to run against able-bodied athletes. Born without fibula bones in his legs, he has won numerous Paralympian medals and smashed a clutch of records during a career that saw him take on the mantle of role model and inspiration for his determination to overcome adversity and compete at the pinnacle of athletics.