After a 39-day high profile trial, Oscar Pistorius' defense attorneys rested their case, putting emphasis on the fact that the world renowned Paralympic athlete is still a man that suffers from a disability and profound sense of vulnerability.

Pistorius was the first amputee to compete as an Olympic track athlete after he was selected to represent South Africa in the 2012 London Summer Olympics. However, his life took a sharp turn when he fatally shot his girlfriend Reeva Steenkamp on Feb. 14, 2013. The South African track star has pleaded not guilty to first degree murder, arguing that he shot her by mistake because he thought she was an intruder in his home. Prosecutors, however, say he killed her out of rage after the couple had an argument in the wee hours of Valentine's Day.

During the trial, Pistorius' attorney's argued that the "Blade Runner" felt vulnerable to a possible intruder because he was not wearing his prosthetic legs at the time and had limited mobility. As a result, he decided to confront the intruder, rather than take flight. Pistorius' defense team reiterated this argument in the closing stages of the trial.

"Although he loathes to be pitied in any way, the hard truth is that he does not have lower legs," said leading South African sports physician Wayne Derman of Pistorius, according to the New York Times. "You've got a paradox -- of an individual who is supremely able and an individual who is significantly disabled," he added.

Both sides will make their final oral arguments in court on Aug. 7 and 8 and a verdict could be decided as early as the end of August.

The last days of the trial were somewhat overshadowed by a chilling new video that shows Pistorius re-enacting the sequence of events that occurred on the night he fatally shot his girlfriend.

On Sunday, Australian broadcaster Channel Seven aired the leaked video footage of the 27-year-old Paralympic winner.

The video, which appears to have been recorded at the sprinter's uncle's house, shows Pistorius walking on his stumps while pretending to hold a gun. He is also seen picking up and carrying his sister, who appears in the video as a body double for Steenkamp. The video also shows him with more mobility than the defense team described.

Pistorius "faces 25 years to life in prison if found guilty of premeditated murder," according to The Associated Press.