Pistorius trial: Defense alleges police errors

Oscar Pistorius in the dock as he waits for the proceedings his murder trial to begin in court in Pretoria, South Africa, Tuesday, March 18, 2014. Osacr Pistorius is on trial for the murder of his girlfriend Reeva Steenkamp on Valentines Day, 2013. (AP Photo/Marco Longari, Pool)

Oscar Pistorius in the dock as he waits for the proceedings his murder trial to begin in court in Pretoria, South Africa, Tuesday, March 18, 2014. Osacr Pistorius is on trial for the murder of his girlfriend Reeva Steenkamp on Valentines Day, 2013. (AP Photo/Marco Longari, Pool)

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