Pistorius trial adjorned until May

Oscar Pistorius yawns as he listens to forensic evidence being given in court in Pretoria, South Africa, Thursday, April 17, 2014. One of Oscar Pistorius’ defense experts was grilled by the chief prosecutor for the second day at the Olympic runner’s murder trial Thursday, with forensic specialist Roger Dixon’s expertise and professionalism in conducting various tests regarding Reeva Steenkamp’s shooting death again sternly questioned. Pistorius is charged with premeditated murder for shooting Steenkamp multiple times on Feb. 14, 2013. Prosecutors say that he killed Steenkamp after a fight. The trial was adjourned until May 5. (AP Photo/Alet Pretorius, Pool)

A prosthetic leg is handed to the court in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Alet Pretorius, Pool)

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

Oscar Pistorius cradles his head in his hands as he listens to forensic evidence being given in court in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Alet Pretorius, Pool)

June Steenkamp, center, mother of Reeva Steenkamp, bows her head while listening to forensic evidence in Pretoria, South Africa, Thursday, April 17, 2014 at the murder trial of Oscar Pistorius. One of Oscar Pistorius’ defense experts was grilled by the chief prosecutor for the second day at the Olympic runner’s murder trial Thursday, with forensic specialist Roger Dixon’s expertise and professionalism in conducting various tests regarding Reeva Steenkamp’s shooting death again sternly questioned. Pistorius is charged with premeditated murder for shooting Steenkamp multiple times on Feb. 14, 2013. Prosecutors say that he killed Steenkamp after a fight. The trial was adjourned until May 5. (AP Photo/Themba Hadebe, Pool)

Forensic expert, Roger Dixon, holds up a court exhibit, a prosthesis belonging to Oscar Pistorius, as he answers questions put to him by chief state prosecutor Gerrie Nel , during the murder trial of Pistorius, in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe, Pool)

Oscar Pistorius, with unidentified relative leaves the high court in Pretoria, South Africa, Thursday, April 17, 2014. One of Oscar Pistorius’ defense experts was grilled by the chief prosecutor for the second day at the Olympic runner’s murder trial Thursday, with forensic specialist Roger Dixon’s expertise and professionalism in conducting various tests regarding Reeva Steenkamp’s shooting death again sternly questioned. Pistorius is charged with premeditated murder for shooting Steenkamp multiple times on Feb. 14, 2013. Prosecutors say that he killed Steenkamp after a fight. The trial was adjourned until May 5. (AP Photo/Themba Hadebe)

Oscar Pistorius, left, with unidentified relative leaves the high court in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with murder for the shooting death of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe)

June Steenkamp, mother of Reeva Steenkamp, looks on as South African Olympic and Paralympic athlete Oscar Pistorius sits in the dock during his murder trial in Pretoria

State prosecutor Nel questions defense expert witness Dixon during the murder trial of South African Olympic and Paralympic athlete Pistorius in Pretoria

Defense expert witness Dixon holds a magazine rack as Prosecutor Nel looks on during the murder trial of South African Olympic and Paralympic athlete Pistorius in Pretoria

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

June Steenkamp, left, mother of the late Reeva Steenkamp, looks at Oscar Pistorius, front, in court while listening to forensic evidence in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Steenkamp, on Valentines Day in 2013. (AP Photo/Themba Hadebe, Pool)

Oscar Pistorius, front, gets a hug from his brother, Carl, back, in court in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Alet Pretorius, Pool)

Oscar Pistorius rubs his face as he listens to forensic evidence being given in court in Pretoria, South Africa, Thursday, April 17, 2014. Pistorius is charged with the murder of his girlfriend, Reeva Steenkamp, on Valentines Day in 2013. (AP Photo/Alet Pretorius, Pool)

The prosecution in Oscar Pistorius' murder trial on Thursday challenged the credibility of an expert witness for the defense, which was trying to show that the athlete killed his girlfriend by mistake.

Roger Dixon was called by the defense to give evidence to support Pistorius' story that he killed girlfriend Reeva Steenkamp by accident thinking she was an intruder behind the toilet door in his home and about to attack him.

In one, the prosecutor criticized Dixon, a geologist, for not using the exact height of double-amputee athlete Pistorius when standing on his stumps.

"It is something I omitted. I overlooked it at the time," Dixon replied when questioned why his measurements were around 20 centimeters (8 inches) off in a test to see if Pistorius' head and body would have been high enough to be seen by neighbors through a bathroom window. He said he was not trying to "mislead" the court.
— Associated Press