Pistorius returns to the stand for questioning

Oscar Pistorius, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. Pistorius returns to the stand to field questions about his relationship with Steenkamp.

Oscar Pistorius, right, leaves the the high court in Pretoria, South Africa, Thursday, April 10, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

Olympic and Paralympic track star Pistorius arrives ahead of his trial for the murder of his girlfriend Steenkamp, at the North Gauteng High Court in Pretoria

Olympic and Paralympic track star Oscar Pistorius arrives ahead of his trial for the murder of his girlfriend Reeva Steenkamp, at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

Oscar Pistorius' uncle Arnold Pistorius, right, with wife Lois, left, arrives at the high court in Pretoria, South Africa, Thursday, April 10, 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)

June, mother of Reeva Steenkamp, looks on at the murder trial of Pistorius at the North Gauteng High Court in Pretoria

June Steenkamp, mother of Reeva Steenkamp, looks on at the murder trial of Olympic and Paralympic track star Oscar Pistorius at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Marco Longari/Pool (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

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

PRETORIA, SOUTH AFRICA - APRIL 10: (SOUTH AFRICA OUT): Advocate Barry Roux listens to Oscar's testimony in the Pretoria High Court on April 10, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2014. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukesi-Pool/Getty Images)

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

PRETORIA, SOUTH AFRICA - APRIL 10: (SOUTH AFRICA OUT) State prosecutor Gerrie Nel questions Oscar during cross examination in the Pretoria High Court on April 10, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2014. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukesi-Pool/Getty Images)

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

PRETORIA, SOUTH AFRICA - APRIL 10: (SOUTH AFRICA OUT) Carl Pistorius listens to Oscar's testimony in the Pretoria High Court on April 10, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2014. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukesi-Pool/Getty Images)

State prosecutor Nel looks on as Pistorius testifies during his trial at the North Gauteng High Court in Pretoria

State prosecutor Gerrie Nel looks on as Olympic and Paralympic track star Oscar Pistorius testifies during his trial at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Marco Longari/Pool (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

Arnold, uncle of Olympic and Paralympic track star Oscar Pistorius, arrives ahead of his nephew's trial for the murder of Steenkamp at the North Gauteng High Court in Pretoria

Arnold Pistorius, uncle of Olympic and Paralympic track star Oscar Pistorius, arrives ahead of his nephew's trial for the murder of Reeva Steenkamp at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW HEADSHOT)

Brother Carl Pistorius, center, and Aimee Pistorius, right, listen as state prosecutor Gerrie Nel questions accused Oscar Pistorius, in court in Pretoria, South Africa, Thursday, April 10, 2014. Pistorius is charged with the murder of his girlfriend Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Marco Longari, Pool)

June Steenkamp, center wearing glasses, mother of the late Reeva Steenkamp, listens as state prosecutor Gerrie Nel questions Oscar Pistorius, in court in Pretoria, South Africa, Thursday, April 10, 2014. Pistorius is charged with the murder of his girlfriend Steenkamp, on Valentines Day in 2013. (AP Photo/Marco Longari, Pool)

State prosecutor Nel gestures as he cross examines Pistorius during his ongoing murder trial in Pretoria

State prosecutor Gerrie Nel gestures as he cross examines South African Olympic and Paralympic track star Oscar Pistorius during his ongoing murder trial in Pretoria, April 10, 2014. Pistorius is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Marco Longari/Pool (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW TPX IMAGES OF THE DAY)

A member of the entourage of Olympic and Paralympic track star Pistorius holds her head while he testifies during his trial at the North Gauteng High Court in Pretoria

A member of the entourage of Olympic and Paralympic track star Oscar Pistorius holds her head while he testifies during his trial at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Marco Longari/Pool (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

June, mother of Reeva Steenkamp, attends the murder trial of Olympic and Paralympic track star Pistorius at the North Gauteng High Court in Pretoria

June Steenkamp, mother of Reeva Steenkamp, attends the murder trial of Olympic and Paralympic track star Oscar Pistorius at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Reeva Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Marco Longari/Pool (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

Arnold, uncle of Olympic and Paralympic track star Oscar Pistorius, arrives with his wife Lois ahead of his nephew's trial at the North Gauteng High Court in Pretoria

Arnold Pistorius, uncle of Olympic and Paralympic track star Oscar Pistorius, arrives with his wife Lois (front L) ahead of his nephew's trial for the murder of Reeva Steenkamp, at the North Gauteng High Court in Pretoria, April 10, 2014. The track star, nicknamed the "Blade Runner", is on trial for murdering his girlfriend Steenkamp at his suburban Pretoria home on Valentine's Day last year. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: SPORT ATHLETICS CRIME LAW)

Barry Roux, the lawyer defending Oscar Pistorius, with his team arrives at the high court in Pretoria, South Africa, Thursday, April 10, 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

PRETORIA, SOUTH AFRICA - APRIL 10: (SOUTH AFRICA OUT) Aimee, Lois and Arnold Pistorius listen to Oscar's testimony in the Pretoria High Court on April 10, 2014, in Pretoria, South Africa. Oscar Pistorius stands accused of the murder of his girlfriend, Reeva Steenkamp, on February 14, 2014. This is Pistorius' official trial, the result of which will determine the paralympian athlete's fate. (Photo by Werner Beukesi-Pool/Getty Images)