Pistorius trial - Defense team builds their case

Oscar Pistorius' lawyers at his murder trial Wednesday tried to roll back the prosecution's momentum, but the prosecutor sharply questioned the credentials and findings of a forensic expert for the defense.

Following the tough cross-examination of Pistorius that lasted five days, his defense attempted to re-assert his story that his killed his girlfriend by mistake, but the prosecutor strongly challenged the expert witness.
— Associated Press

South African Olympic and Paralympic athlete Oscar Pistorius reacts during his murder trial in the North Gauteng High Court in Pretoria

South African Olympic and Paralympic athlete Oscar Pistorius reacts during his murder trial in the North Gauteng High Court in Pretoria, April 16, 2014. Pistorius is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Gianluigi Guercia/Pool (SOUTH AFRICA - Tags: SPORT CRIME LAW TPX IMAGES OF THE DAY ATHLETICS)

Oscar Pistorius, center, shares a hug with an unidentified woman as he leaves the high court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

Oscar Pistorius, middle, accompanied by brother Carl Pistorius, behind, and police officers leaves the high court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

Oscar Pistorius, left, arrives with an unidentified relative as he acknowledges a supporter outside the high court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with murder for the shooting death of his girlfriend Reeva Steenkamp on Valentine's Day in 2013. (AP Photo/Themba Hadebe)

Oscar Pistorius arrives at the high court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with murder for the shooting death of his girlfriend Reeva Steenkamp on Valentine's Day in 2013. (AP Photo/Themba Hadebe)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT):Oscar Pistorius listens to evidence in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THIS IMAGE IS FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: Oscar Pistorius hugs a relative in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

South African Olympic and Paralympic athlete Oscar Pistorius sits in the dock during his murder trial in the North Gauteng High Court in Pretoria

South African Olympic and Paralympic athlete Oscar Pistorius sits in the dock during his murder trial in the North Gauteng High Court in Pretoria April 16, 2014. Pistorius is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/GianluigiI Guercia/Pool (SOUTH AFRICA - Tags: SPORT CRIME LAW ATHLETICS)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): June Steenkamp listens to evidence in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Barry Roux, the lawyer defending Oscar Pistorius, leaves the high court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

Oscar Pistorius holds his head in his hands as he listens to evidence being given in court in Pretoria, South Africa, Tuesday, April 15, 2014 after questioning by state prosecutor Gerrie Nel, had earlier finished. Pistorius is charged with the murder of his girlfriend Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Alon Skuy, Pool)

Oscar Pistorius puts his hand to his face as he listens to forensic evidence being given in court in Pretoria, South Africa, Wednesday, April 16, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Gianluigi Guercia, Pool)

South African Olympic and Paralympic athlete Oscar Pistorius looks on during his murder trial in the North Gauteng High Court in Pretoria

South African Olympic and Paralympic athlete Oscar Pistorius looks on during his murder trial in the North Gauteng High Court in Pretoria, April 16, 2014. Pistorius is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Gianluigi Guercia/Pool (SOUTH AFRICA - Tags: SPORT CRIME LAW)

South African Olympic and Paralympic athlete Oscar Pistorius looks on during his murder trial in the North Gauteng High Court in Pretoria

South African Olympic and Paralympic athlete Oscar Pistorius looks on during his murder trial in the North Gauteng High Court in Pretoria, April 16, 2014. Pistorius is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Gianluigi Guercia/Pool (SOUTH AFRICA - Tags: SPORT CRIME LAW)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): Oscar Pistorius listens to evidence in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): Prosecutor Gerrie Nel questions forensic expert, Roger Dixon, in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): Prosecutor Gerrie Nel questions forensic expert, Roger Dixon, in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): Prosecutor Gerrie Nel questions forensic expert, Roger Dixon, in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT): Forensic expert, Roger Dixon, testifies in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)

Oscar Pistorius Is Tried For The Murder Of His Girlfriend Reeva Steenkamp

BY COURT ORDER, THESE IMAGES ARE FREE TO USE. PRETORIA, SOUTH AFRICA - APRIL 16: (SOUTH AFRICA OUT):Oscar Pistorius listens to evidence in the Pretoria High Court on April 16, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2013. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukes/SAPA/Gallo Images/Getty Images)