Gallery: Oscar Pistorius trial Day 19

State prosecutor Gerrie Nel smiles as he cross-examines Oscar Pistorius during his trial at the North Gauteng High Court in Pretoria. Photo: Siphiwe Sibeko/Reuters

Oscar Pistorius (C) arrives ahead of his trial at the North Gauteng High Court in Pretoria. Photo: Siphiwe Sibeko/Reuters

09/04/2014 Oscar Pistorius is escorted as he walks to the high court in Pretoria. Pistorius stands trial for the premeditated murder of his model girlfriend Reeva Steenkamp at his home in Pretoria East. Picture: Phill Magakoe

Oscar Pistorius, center right, accompanied by relatives walks towards the high court in Pretoria. Photo: Themba Hadebe/AP

Barry Roux, the lawyer defending Oscar Pistorius, walks past newspaper headlines outside the high court in Pretoria, South Africa, Wednesday, April 9, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

State prosecutor Gerrie Nel during cross questioning of Oscar Pistorius, in court in Pretoria. Photo: Siphiwe Sibeko/AP

State prosecutor Gerrie Nel looks on as he cross-examines Oscar Pistorius during his trial at the North Gauteng High Court in Pretoria. Photo: Siphiwe Sibeko/Reuters

Jane Steenkamp (L), Reeva Steenkamp's mother is comforted by unidentified relative after her dead daughter's picture was shown on screen during the trial. Photo: Siphiwe Sibeko/Reuters

Sister of Oscar Pistorius, Aimee Pistorius, left, and aunt Lois Pistorius, right, listen as Oscar Pistorius testifies in court in Pretoria. Photo: Sydney Seshibedi/AP

State prosecutor Gerrie Nel during cross-examination of Oscar Pistorius, in court in Pretoria. Photo: Siphiwe Sibeko/AP

Family members of Oscar Pistorius listen during his trial at the North Gauteng High Court in Pretoria. Photo: Siphiwe Sibeko/Reuters

Defense lawyer Barry Roux, reacts to questions by state prosecutor, during cross-examination of Oscar Pistorius, in court in Pretoria. Photo: Siphiwe Sibeko/AP

09/04/2014 Oscar Pistorius is escorted as he walks out of the high court in Pretoria. Pistorius stands trial for the premeditated murder of his model girlfriend Reeva Steenkamp at his home in Pretoria East. Picture: Phill Magakoe