Blade Runner Oscar Pistorius will continue his fight for bail in the fourth day of a dramatic court hearing.

The Paralympian's defence team summed up their case on Thursday arguing that the sports star, who said he shot girlfriend Reeva Steenkamp because he thought she was a burglar, is too famous to flee bail.

pistorius audience

Oscar Pistorius may discover his bail fate on Friday

But the prosecution claim it was premeditated murder and that Pistorius "intended to kill".

In a dramatic twist, the lead investigator in the case against Pistorius was replaced after he was charged with seven counts of attempted murder.

The charges against Hilton Botha relate to an incident in October 2011 and he is due to appear in court himself in May with two other police officers, accused of firing shots at a minibus which had seven people inside.

The case was previously dropped but he was charged ln Thursday, to the surprise of prosecutors in the Pistorius case.

National Police Commissioner Riah Phiyega said Botha had been replaced by senior detective Lieutenant General Vineshkumar Moonoo, Divisional Commissioner of the Detective Service.

It came on the same day as the court was interrupted by a "threat" and sports giant Nike confirmed it has suspended its contract with the runner.

In a statement, Nike said: "Nike has suspended its contract with Oscar Pistorius. We believe Oscar Pistorius should be afforded due process and we will continue to monitor the situation closely."

The company's now infamous ad showed 26-year-old Pistorius powering out of a set of sprinting blocks, wearing his prosthetic blades, alongside the words: "I Am The Bullet In The Chamber."

Pistorius has admitted shooting girlfriend Miss Steenkamp, 29, through the bathroom door, thinking she was a burglar.

Realising his mistake, he broke the door down with a cricket bat and carried her downstairs, he said.

The prosecution claim it was a premeditated murder, but his defence has argued there is no evidence to suggest the athlete's account of events is untrue.

Defence lawyer Barry Roux said poor-quality evidence by Botha had exposed disastrous shortcomings in the state's case.

He said he had been selective with what he said and determined to "bolster the state's case", but could not refute Pistorius' version of what happened.

Mr Roux said Miss Steenkamp staying with the Paralympian was consistent with a loving relationship, and that after she was shot, evidence suggested Pistorius was desperate to save her life.

He said the fact there was no urine in her bladder suggested she had got up to go to the toilet and if Pistorius had shouted about an intruder, it was likely she would have locked the door adding: "The evidence is not that the applicant knew the toilet was locked when he fired the shots."

Asked if there would be shock if Pistorius was released, Mr Roux said there would be shock if he wasn't.

Summing up the prosecution case, Gerrie Nel said the onus was not on the state, but on Pistorius, to prove he should be given bail.

He asked if the Paralympian thought "I'm Oscar Pistorius, I'm a world renowned athlete, that in itself is special", was an argument for exceptional circumstances and said the star wanted to continue with his life "as if this incident never happened".

He said: This total lack of insight and willingness to take responsibility for his deeds increases his flight risk."

And he claimed Pistorius' version of events was improbable and his actions that night were indicative of a man ready and willing to fire to kill.

"He fired four shots, not one shot," he said. "The only reason you fire four shots is to kill. On his own version, he's bound to be convicted."

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  • Photographers take photos of Olympic athlete Oscar Pistorius as he stands in the dock during his bail hearing at the magistrates court in Pretoria, South Africa, Friday, Feb. 22, 2013. The fourth and likely final day of Oscar Pistorius' bail hearing opened on Friday, with the magistrate then to rule if the double-amputee athlete can be freed before trial or if he has to remain in custody over the shooting death of his girlfriend. (AP Photo/Themba Hadebe)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius (hidden) leaves the courthouse in a car in Pretoria on February 22, 2013 after being freed on bail by a magistrate, pending a high-profile trial for killing his girlfriend Reeva Steenkamp. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius (C) is pictured as he leaves the courthouse in Pretoria on February 22, 2013 after being freed on bail by a magistrate, pending a high-profile trial for killing his girlfriend Reeva Steenkamp. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • Oscar Pistorius

    Olympic athlete Oscar Pistorius, silhouetted in front vehicle, center, arrives at a relative's home in Pretoria, South Africa, Friday, Feb 22, 2013. Pistorius was released on bail and will return to court June, 4, 2013 to face a charge of pre-meditated murder in the shooting death of his girlfriend Reeva Steenkamp. (AP Photo/Waldo Swiegers)

  • Olympic athlete Oscar Pistorius' uncle Arnold Pistorius speaks to journalist at the end of the bail hearing at the magistrate court in Pretoria, South Africa, Friday, Feb. 22, 2013. Pistorius was granted bail in the Pretoria Magistrate's Court on Friday. (AP Photo/Themba Hadebe)

  • Oscar Pistorius Bail Hearing - Day 4

    Oscar Pistorius enters court during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Kenny Oldwage, Attorney for Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Aimee and Carl Pistorius, brother and sister of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Ampie Louw, Coach of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Oscar Pistorius enters court during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Family members of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Arnold Pistorius, uncle of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius

    Olympic athlete, Oscar Pistorius , in court Friday Feb. 22, 2013 in Pretoria, South Africa, for his bail hearing charged with the shooting death of his girlfriend, Reeva Steenkamp. The defense and prosecution both completed their arguments with the magistrate soon to rule if the double-amputee athlete can be freed before trial or if he must stay behind bars pending trial. (AP Photo/Antoine de Ras-Star) SOUTH AFRICA OUT

  • Oscar Pistorius Bail Hearing - Day 4

    Oscar Pistorius enters court during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Oscar Pistorius enters court during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Family members of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Aimee Pistorius, sister of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Oscar Pistorius enters court during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Aimee and Carl Pistorius, brother and sister of Oscar Pistorius during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 4

    Arnold Pistorius, uncle of Oscar Pistorius (left) and Aimee Pistorius, sister of Oscar Pistorius (right) during the fourth day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 22 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius

    Olympic athlete, Oscar Pistorius , in court Friday Feb. 22, 2013 in Pretoria, South Africa, for his bail hearing charged with the shooting death of his girlfriend, Reeva Steenkamp. The defense and prosecution both completed their arguments with the magistrate soon to rule if the double-amputee athlete can be freed before trial or if he must stay behind bars pending trial) (AP Photo)

  • Olympic athlete Oscar Pistorius' father Henke Pistorius, right, with his son Carl watch as Oscar Pistorius walks in during his bail hearing at the magistrate court in Pretoria, South Africa, Friday, Feb. 22, 2013. (AP Photo/Themba Hadebe)

  • Olympic athlete Oscar Pistorius stands in the dock during his bail hearing at the magistrates court in Pretoria, South Africa, Friday, Feb. 22, 2013. The fourth and likely final day of Oscar Pistorius' bail hearing opened on Friday, with the magistrate then to rule if the double-amputee athlete can be freed before trial or if he has to remain in custody over the shooting death of his girlfriend. (AP Photo/Themba Hadebe)

  • Olympic athlete Oscar Pistorius stands in the dock during his bail hearing at the magistrates court in Pretoria, South Africa, Friday, Feb. 22, 2013. The fourth and likely final day of Oscar Pistorius' bail hearing opened on Friday, with the magistrate then to rule if the double-amputee athlete can be freed before trial or if he has to remain in custody over the shooting death of his girlfriend. (AP Photo/Themba Hadebe)

  • Oscar Pistorius

    Olympic athlete, Oscar Pistorius , in court Friday Feb. 22, 2013 in Pretoria, South Africa, for his bail hearing charged with the shooting death of his girlfriend, Reeva Steenkamp. The defense and prosecution both completed their arguments with the magistrate soon to rule if the double-amputee athlete can be freed before trial or if he must stay behind bars pending trial. (AP Photo)

  • Oscar Pistorius

    Olympic athlete, Oscar Pistorius , in court Friday Feb. 22, 2013 in Pretoria, South Africa, for his bail hearing charged with the shooting death of his girlfriend, Reeva Steenkamp. The defense and prosecution both completed their arguments with the magistrate soon to rule if the double-amputee athlete can be freed before trial or if he must stay behind bars pending trial. (AP Photo)

  • Oscar Pistorius

    Olympic athlete, Oscar Pistorius , in court Friday Feb. 22, 2013 in Pretoria, South Africa, for his bail hearing charged with the shooting death of his girlfriend, Reeva Steenkamp. The defense and prosecution both completed their arguments with the magistrate soon to rule if the double-amputee athlete can be freed before trial or if he must stay behind bars pending trial. (AP Photo)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius appears at the Magistrate Court in Pretoria on February 22, 2013. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius appears at the Magistrate Court in Pretoria on February 22, 2013. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    The famliy of South African Olympic sprinter Oscar Pistorius appears on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    The famliy of South African Olympic sprinter Oscar Pistorius appears on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    The famliy of South African Olympic sprinter Oscar Pistorius appears on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius appears at the Magistrate Court in Pretoria on February 22, 2013. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    Family members of South African Olympic sprinter Oscar Pistorius appear on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius' coach Ampie Louw is pictured on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius is pictured at the Magistrate Court in Pretoria on February 22, 2013. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius appears on February 22, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-SPORT-CRIME-POLICE

    South African Olympic sprinter Oscar Pistorius appears at the Magistrate Court in Pretoria on February 22, 2013. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. Pistorius denies the charge, saying that he shot 29-year-old Steenkamp repeatedly through a locked bathroom door in the dead of night by accident, having mistaken her for a burglar. AFP PHOTO / ALEXANDER JOE (Photo credit should read ALEXANDER JOE/AFP/Getty Images)

  • SAFRICA-CRIME-SPORTS-POLICE

    South African Olympic sprinter Oscar Pistorius appears on February 20, 2013 at the Magistrate Court in Pretoria. Pistorius battled to secure bail as he appeared on charges of murdering his model girlfriend Reeva Steenkamp on February 14, Valentine's Day. South African prosecutors will argue that Pistorius is guilty of premeditated murder in Steenkamp's death, a charge which could carry a life sentence. AFP PHOTO / STEPHANE DE SAKUTIN (Photo credit should read STEPHANE DE SAKUTIN/AFP/Getty Images)

  • Olympic athlete Oscar Pistorius stands during his bail hearing at the magistrate court in Pretoria, South Africa, Thursday, Feb. 21, 2013. South Africa's National Prosecuting Authority acknowledged that the timing of attempted murder charges against a police detective leading the investigation into Oscar Pistorius is "totally weird" and that he should dropped from the case against the world-famous athlete. (AP Photo/Themba Hadebe)

  • Olympic athlete Oscar Pistorius stands during his bail hearing at the magistrate court in Pretoria, South Africa, Thursday, Feb. 21, 2013. The lead investigator in the murder case against Pistorius faces attempted murder charges himself over a 2011 shooting, police said Thursday in another potentially damaging blow to the prosecution. Prosecutors said they were unaware of the charges against veteran detective Hilton Botha when they put him on the stand in court to explain why Pistorius should not be given bail in the Valentine's Day shooting death of his girlfriend. (AP Photo/Themba Hadebe)

  • Hilton Botha

    FILE- In this Wednesday, Feb. 20, 2013 file photo, Investigating officer Hilton Botha, sits inside the court witness box during the Oscar Pistorius bail hearing at the magistrate court in Pretoria, South Africa. The lead investigator in the murder case against Oscar Pistorius faces attempted murder charges himself over a 2011 shooting, police said Thursday, Feb. 21, 2013, in another potentially damaging blow to the prosecution. Prosecutors said they were unaware of the charges against veteran detective Hilton Botha when they put him on the stand in court to explain why Pistorius should not be given bail in the Valentine's Day shooting death of his girlfriend. Police Brig. Neville Malila told The Associated Press that Botha — who gave testimony in the Pistorius bail hearing on Wednesday — is scheduled to appear in court in May on seven counts of attempted murder related to an incident in October 2011 when Botha and two other police officers fired at a minibus they were trying to stop. (AP Photo/Themba Hadebe, File)

  • Olympic athlete Oscar Pistorius, left, stands as the judges leaves the court, during his bail application at the magistrate court, in Pretoria, South Africa, Tuesday, Feb. 19, 2013. Pistorius fired into the door of a small bathroom where his girlfriend was cowering after a shouting match on Valentine's Day, hitting her three times, a South African prosecutor said Tuesday as he charged the sports icon with premeditated murder. The magistrate ruled that Pistorius faces the harshest bail requirements available in South African law. He did not elaborate before a break was called in the session. (AP Photo/Themba Hadebe)

  • Oscar Pistorius Bail Hearing - Day 2

    Oscar Pistorius enters the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Carl and Aimee Pistorius, brother and sister of Oscar Pistorius and during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    General View GV of the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Oscar Pistorius enters the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Oscar Pistorius enters the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Oscar Pistorius enters the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Carl and Aimee Pistorius, brother and sister of Oscar Pistorius talk to Henke Pistorius (father) during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix

  • Oscar Pistorius Bail Hearing - Day 2

    Oscar Pistorius enters the court room during the second day of Oscar Pistorius bail application at Pretoria Magistrates Court, Pretoria, South Africa on 20 February 2013 Pic Chris Ricco/BackpagePix