Did Oscar Pistorius murder girlfriend? Prosecution to cross examine

Oscar Pistorius was testifying for a second day at his murder trial on Tuesday, answering questions from his defence lawyer. Pistorius is expected to speak about the night he shot girlfriend Reeva Steenkamp and will also be cross-examined by the prosecution. (Read: Crying Oscar Pistorius apologises to murdered girlfriend's family)

The double-amputee Olympic runner was the second witness called by the defense on Monday, when he made a tearful apology to Steenkamp's family. He said he was now on medication and suffered from panic attacks, and had a long-held fear of crime, which he says contributed to him firing through a toilet door on Valentine's Day last year thinking his girlfriend was a nighttime intruder. (Read: Tension-filled court proceedings take emotional toll on tribunal)

Prosecutors say that Pistorius is lying and killed Steenkamp intentionally after an argument and charged the world-famous athlete with premeditated murder.