At murder trial, expert says Pistorius was torn by athletic triumph and physical disability

PRETORIA, South Africa – A physician who has treated Oscar Pistorius has testified at the athlete’s murder trial that he is a “paradox” whose racing triumphs contrast sharply with the severe limitations of his disability.

Wayne Derman, a professor of sport and exercise medicine at the University of Cape Town, said in court Thursday that the contrast likely contributed to stress and anxiety for the double-amputee runner, who fatally shot girlfriend Reeva Steenkamp.

Derman is testifying for the defence, which wants to show that Pistorius’ alleged sense of vulnerability was a factor in the nighttime shooting in his home last year.

Pistorius says he killed Steenkamp by mistake, thinking there was a dangerous intruder in his home. The prosecution says he intentionally killed the 29-year-old model after the couple had a Valentine’s Day argument.