Prosecutors in South Africa charged Olympian Oscar Pistorius with premeditated murder on Tuesday, claiming that he shot his girlfriend Reeva Steenkamp through the door of his bathroom where she was taking cover after a fight. Pistorius said that he shot her thinking she was a robber, and that he felt vulnernable because he didn't have his prosthetic legs on. After shooting, he then put on his legs, bashed the door in with a cricket bat, and ran downstairs with Steenkamp as she died in his arms. Head prosecutor Gerrie Nel quickly dismantled the argument. “It was all part of the preplanning. Why would a burglar lock himself inside the bathroom?” he asked. Pistorius, who began Tuesday’s hearing straight-faced, allegedly broke down as the prosecution continued, wiping away tears as he sobbed in the courtroom.