"The most amazing thing is he walked from his bedroom, with a gun in his hand to the bathroom. He fired four shots and he was on his stumps and it was all in the dark."
Pistorius' lawyers had acoustics expert Ivan Lin testify whether neighbors could have heard what they described as a woman screaming before Pistorius shot her. Pistorius has insisted that Steenkamp did not scream, and the screams they heard were likely from Pistorius after he realized he had shot his lover, not an intruder.
Lin told the court that after using acoustical measuring devices he determined that the family that lived furthest from Pistorius - and said they heard a woman screaming - would not have been able to clearly distinguish between a male and female voice at that distance.
The second couple, who lived closer to Pistorius, would have been able to hear clearly.
Pistorius, 27, faces 25 years to life in prison if found guilty of premeditated murder, and could also face years in prison if convicted of murder without premeditation or negligent killing. He has argued that he mistook Steenkamp for an intruder. Prosecutors allege that he purposefully shot her.
The Associated Press contributed to this report.