Pistorius’ lawyer Barry Roux accused Bernie van Staden of causing a "great disturbance" to the evidence, but the police photographer insisted he had followed procedure and taken photos of the original crime scene – although he did to admit to moving bloodied towels and a duvet during his hunt for evidence.
Roux claimed that police errors had affected the scene to the point where the evidence could not be used.
"How does it happen there was such great disturbance in that scene?" asked Roux, after photos suggested sheets had been moved.
Tuesday concluded with prosecutor Gerrie Nel calling police ballistics expert Captain Chris Mangena.
Mangena is expected to deliver results on whether Pistorius was wearing his prosthetic legs on Wednesday, after measuring the athlete with and without his legs.
The results are expected to shed light on Pistorious’ claims that he accidently shot Steenkamp.
Pistorius, 27, denies murdering his girlfriend on Valentine’s Day last year, saying he mistook her for an intruder.
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