The new BBC documentary The Trials of Oscar Pistorius will air on Sunday night, and tells the story of the trial of the Olympic athlete who murdered his girlfriend, paralegal Reeva Steenkamp, in 2013.
Oscar was arrested and charged with murder after shooting Reeva, 29, four times through the bathroom door, claiming that he believed that she was an intruder.
He was initially found guilty of culpable homicide instead of murder and sentenced to a five-year prison sentence. However, the Supreme Court of Appeal of South Africa overturned the verdict shortly after and convicted him of murder, adding an extra six years to his sentence.
Following an appeal, he was sentenced to 13 years in prison, with Justice Legoabe Willie Seritie saying at the time: "The sentence imposed by the [high court] with respect to murder is set aside and substituted with the following - the respondent's imprisonment for 13 years and five months."
Oscar is currently serving his sentence at the Attridgeville Correctional Centre, where he will become eligible for parole in 2023.
In a television interview back in 2016, Oscar said: "I don’t want to have to waste my life sitting there. If I was afforded the opportunity of redemption, I would like the opportunity to help those less fortunate, like I had in my past.
The former athlete has been sentenced to 13 years in prison
"I would like to believe that, if Reeva could look down upon me, she would want me to live that life."
His father, Henke Pistorius, spoke to The Times about Oscar's time in prison, saying: "Oscar leads the studies and is able to accommodate those who aren’t so familiar with the Bible to explain the meaning of all the verses. I have no doubt that Oscar has changed the environment in the prison for the better, he is helping to mediate between people and is having a positive influence."