Oscar Pistorius' murder case took a sensational twist Thursday when it was revealed that the chief investigator who analyzed the scene of Reeva Steenkamp's fatal shooting faces seven counts of attempted murder charges himself.

Hilton Botha sits inside the court witness box during the Oscar Pistorius bail hearing. (AP)Hilton Botha, whose stumbling and at times incoherent evidence on day two of Pistorius' bail hearing gave the Blade Runner's case a serious boost, was allegedly one of three drunk police officers who opened fire on a mini-bus taxi full of passengers in 2011, according to South Africa's Eyewitness News.

According to Botha, the shooting took place as part of the investigation into the murder of Denise Stratford, a Girl Scout leader whose body was discovered stuffed into a drain in 2011. Botha and colleagues were tracking the suspect and as part of their inquiries fired at the mini-bus when it failed to pull over when requested.

Botha was arrested at the time due to the charges, which were subsequently dropped, before it emerged Thursday that they had been reinstated.

"There was a decision taken by the director of public prosecution's office to charge the members, each one of them, with seven counts of attempted murder," said police spokesman Neville Malila. "That was the number of people that were in the taxi."

Botha denied he was drunk during the alleged incident and told South African legal journalist Karyn Maughan on Thursday morning that the reinstatement of the charge is "beyond my comprehension."

"I can only think it is linked to my work on the Oscar Pistorius case," he said.

In a statement, however, the South African National Prosecuting Authority revealed the murder charge against Botha was reinstated before the Pistorius incident, reportedly as early as Feb. 4. Botha insisted to the media that he only learned of the reinstatement after the Valentine's Day killing of Steenkamp. According to Malila, Botha is scheduled to appear in court in May to face the charges.

Thursday, the NPA called for Botha to be taken off the Pistorius case.

"If we have an investigating officer that is facing such serious charges, it cannot happen that he continues with this case," a spokesperson said.

Botha had become one of the major characters in the Pistorius case as it has unfolded with a bail hearing that stretched into a third day and resembled a mini-trial with detailed evidence being given from both sides.

The reason for the elongated hearing is a product of both the vagaries of the South African legal system and the desire of both the prosecution and defense to gain a positive result on bail.

During his testimony Wednesday, Botha unraveled under cross-examination from defense attorney Barry Roux, admitting that he couldn't find anything to contradict Pistorius' claim that he mistook Steenkamp for an intruder. Botha also opened himself to allegations he had contaminated the crime scene by revealing he had not worn protective shoes and was forced to admit one of his witnesses, a neighbor, was more than a quarter mile away from the scene.