Oscar Pistorius is severely traumatised after killing girlfriend Reeva Steenkamp and will become an increasing suicide risk unless he continues to get mental health care, the judge overseeing his murder trial has heard.
Defence lawyer Barry Roux read excerpts from a psychologist's report that said the double-amputee runner is suffering depression and post-traumatic stress disorder and "his condition is likely to worsen" if professional treatment for those conditions is halted.
The report was compiled during a 30-day observation period at a state psychiatric hospital.
A report was also compiled by three psychiatrists. The experts concluded that Pistorius was not mentally ill when he fatally shot Ms Steenkamp through a closed toilet door in the early hours of February 14, 2013.
The court-ordered evaluation occurred after a psychiatrist testifying for the defence said Pistorius was suffering from an anxiety disorder that may have influenced his actions on the night he killed Ms Steenkamp.
At times during his trial, Pistorius has wailed and retched in apparent distress, particularly during graphic testimony about the shooting and also when the athlete was on the witness stand. At other times, he has been calm and taken notes.
Chief prosecutor Gerrie Nel has suggested Pistorius feigned distress in order to dodge a tough cross-examination; the athlete's camp has denied his emotional displays were fake.
Pistorius says he shot Ms Steenkamp by mistake, fearing there was a dangerous intruder in his home. The prosecution alleges he killed her intentionally after a Valentine's Day argument.
Pistorius, who is free on bail, faces 25 years to life in prison if found guilty of premeditated murder, but he could also be sentenced to significant time behind bars if convicted of murder without premeditation or negligent killing. He also faces gun-related charges.
The report by the psychologist found that Pistorius did not have a history of "abnormal aggression or explosive violence", has a past of insecure and vulnerable feelings and does not display narcissistic tendencies associated with abusive relationships, according to Mr Roux.
The prosecution, however, has described the athlete as reckless and egotistical, given to jealousy, gun-play and driving at high speeds.
Also today, a medical expert who has treated Pistorius said the athlete has a hand tremor as well as a sleep disorder that required medication.
Wayne Derman, a professor of sport and exercise medicine at the University of Cape Town, testified that he found Pistorius to be "hyper-vigilant" and was restless, often looking around quickly and scanning for possible threats.
"He is an anxious individual," Mr Derman said.
He testified for the defence, which is trying to bolster the idea that the Paralympian's purported fear of crime may have pushed him to fire through a closed toilet door and that his disability contributed to an increased sense of vulnerability.