Oscar Pistorius is currently serving the remainder of his five-year sentence under house arrest after being released from prison last October.
However, the 29-year-old - who was found guilty of murdering his girlfriend, Reeva Steenkamp, in February 2013 - could be sentenced to 15 years behind bars later this week.
During the re-sentencing hearing today, Prison Health Manager Charlotte Mashabani revealed that Pistorius became angry with her for walking into his cell and walking him during a daily morning rounds schedule.
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"He became angry. He just shouted that I'm disturbing him, that I must 'get out, get out', [because] he's still sleeping,” Ms Mashabani was quoted as saying by the Mirror. “And then he covered himself with a sheet.
"I explained that there was no way we could bypass his cell because it is our responsibility that we must check on him."
Furthermore, Ms Mashabani claims Pistorius demanded to see his own private doctor after refusing to take medication prescribed for him by the institution.
Pistorius described as a 'broken' man
The former Paralympian is currently on medication for depression, anxiety and insomnia, according to professor Jonathan Scholtz, who described Steenkamp’s killer as “broken”.
“One would describe him as broken,” he commented. “In my opinion his current condition warrants hospitalisation.
“Since 2013, he becomes traumatised when he hears the sound of gunfire.
“He never wants to touch a firearm again.”
Barry Steenkamp: Pistorius must pay
However, rather than hospitalisation, the father of Steenkamp told the court Pistorius has to pay for his actions.
Talking about dealing with the trauma caused by her daughter’s murder, an emotional Barry Steenkamp said: "I don't wish that on any human being.
"It devastated us. I ended up having a stroke and so many things have happened since then."
The 73-year-old did, however, claimed that he and his wife had been able to forgive the double-amputee athlete - despite having had no contact with him since the murder.
"You must understand why forgiving doesn't exonerate you from the crime you committed," he continued, per BBC News.
Mr Steenkamp also begged the court to show the world the graphic photos of his daughter’s gunshot wounds.
"What I would like the world to see here are the wounds inflicted on to Reeva and the pain that she must have gone through,” he added.
Does Oscar Pistorius deserve to be jailed for 15 years? Have your say by leaving a comment below.