Pistorius defense expert challenged
PRETORIA, South Africa -- 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 shot his girlfriend by mistake.
Roger Dixon was called by the defense to give evidence to support Pistorius' story that he killed Reeva Steenkamp by accident, thinking she was an intruder behind a toilet stall door in his home.
Pistorius is charged with premeditated murder for shooting Steenkamp ...
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