Oscar Pistorius says he just wants to "be alone" since his release on bail and is feeling "a lot of remorse" over the death of his girlfriend Reeva Steenkamp.
The Olympic athlete is staying at his uncle's home in Pretoria after a court banned him from returning to the luxury home where he shot Ms Steenkamp through a bathroom door.
His spokeswoman in South Africa told Sky News: "He told me, 'I just want this time to be alone'. He is in his room, he's spending time alone and he's feeling a lot of remorse."
The athlete's family has also released a new statement, saying: "Oscar will never be the same ... having to live with the knowledge that he caused the death of the woman he loved, and that he can never undo the immense pain and loss this has caused Reeva's family and friends".
His uncle Arnold added: "We are acutely aware of the fact that this is only the beginning of a long road to prove that, as we know, Oscar never intended to harm Reeva, let alone cause her death."
Pistorius, 26, is accused of premeditated murder after the Valentine's Day shooting. He denies murder.
Lawyers for the defence and prosecution are starting work on the trial phase of a case that is likely to grip South Africa and the world, with the next hearing set for June 4.
The athlete arrived at his uncle's house on Friday after paying 10% of his one million rand (£73,000) bail at Pretoria's Brooklyn police station, where he had been held for a week.
Meanwhile, Ms Steenkamp's father has told a South African newspaper that Pistorius will "suffer" if he is lying about how she died.
The Beeld newspaper quotes Barry Steenkamp as saying Pistorius will have to "live with his conscience" if his assertion that he accidentally shot the 29-year-old law graduate is false.
He said: "There are only two people who really know what happened and it's Oscar Pistorius and the Lord.
"It does not matter how much money he has and how good his legal team is, he must live with his conscience if he let his lawyers tell lies on his behalf.
"He will have to live with his conscience. But if he speaks the truth, I can perhaps someday forgive him."
Horse trainer Mr Steenkamp said he might be able to forgive Pistorius one day if the double-amputee Olympian is telling the truth.
Her mother said that Pistorius' family had sent a card and flowers offering condolences for the death of her daughter but she added it meant little because: "They are not to blame."
However, her uncle Mike Steenkamp said the timing of the family's actions was poor and that they had not initially tried to contact Reeva's bereaved parents.
Chief magistrate Desmond Nair approved bail for Pistorius on Friday at the end of a two-hour summary in which he found the accused was unlikely to skip bail, be violent or approach any witnesses.
Nair said he had been influenced by Pistorius' decision to submit a detailed affidavit, in which he claimed he accidentally shot Ms Steenkamp through the bathroom door at his home in the east of Pretoria, thinking she was an intruder.
Under his bail conditions Pistorius must surrender any firearms and his passport and can not enter any international departure hall.
He is also is banned from using any prohibited substance or alcohol and must report to police twice a week as part of his bail conditions.
:: It has also emerged that the Twitter account of Pistorius' brother, Carl, was hacked and a false message, purporting to be from the sprinter and thanking supporters, was posted.