The former lead police investigator in the case also told The Associated Press that he had fears that reporters were trying to buy pictures of key pieces of evidence from officers in the first few days after the shooting, including the toilet door through which Pistorius fired the shots that killed Steenkamp inside the athlete's home in the predawn hours of Valentine's Day.
The door was then taken from inside the bathroom in Pistorius' house and put in "a body bag" and moved to a senior policeman's office, former detective Hilton Botha said.
Pistorius was initially held at Boschkop, a station close to his home in suburban Pretoria, after being arrested on Feb. 14 following the killing of Steenkamp at his house. The Olympian was later moved to another police station for his bail hearing at Pretoria Magistrate's Court.
South Africa's ministry of police declined to give further details on the cellphone photos and any possible disciplinary action against police officers, but the sensational Pistorius case has already cast doubts on the professionalism of South Africa's force.
The same former lead investigating officer, Botha, gave shaky evidence in court during Pistorius' bail hearing and it later emerged that Botha himself was facing seven charges of attempted murder. Botha was removed from the case and later resigned from the South African police.
Botha told the AP on Tuesday that when he was working the case, he had arranged for the toilet door to be taken from Pistorius' house and moved to Boschkop station after another officer told him she had been offered money to provide photographs of it to the media. The officer named by Botha couldn't immediately be reached for comment.