Pistorius murder trial: 10 things to know

POSTED: 10:57 AM PST February 22, 2013    UPDATED: 10:32 AM PDT April 11, 2014 
Oscar Pistorius

Oscar Pistorius was on the stand this week and Friday marked another day of relentless cross-examination as the prosecution challenged his account of the killing of his girlfriend, Reeva Steenkamp.