South African athlete Oscar Pistorius has been giving his account of events that led to the shooting and death of his then girlfriend Reeva Steenkamp on February 14 last year.<br /><br /> During his second day of testimony in the court in Pretoria for Pistorius he described the moment he shot Steenkamp thinking her to be an intruder.<br /><br /> “I heard a noise from inside the toilet that I perceived to be somebody coming out,” he said, his voice cracking. “Before I knew it I had fired four shots at the door.” <br /><br /> His lawyer Barry Roux had earlier tried to establish the nature of the relationship between Pistorius and Reeva Steenkamp.<br /><br /> The athlete said he believed he was more committed to her than she was to him.<br /><br /> The paralympian denies deliberately shooting his girlfriend, claiming he mistook her for an intruder.<br /><br /> On Monday Pistorius made a tearful apology to the family of the victim.<br /><br /> If found guilty the 27-year-old could face a life sentence. <br /><br /> After he gave completed his evidence the court adjourned the trial until Wednesday to allow the athlete time to regain his composure.