PRETORIA, South Africa (AP) — South Africa's top detective was appointed lead investigator in the Oscar Pistorius case Thursday, replacing a veteran policeman who was charged with attempted murder in the latest shock development to hit a case being watched closely by the nation.

National Police Commissioner Riah Phiyega promised that a team of "highly skilled and experienced" officers would investigate the killing of Pistorius' 29-year-old girlfriend. Pistorius, 26, has been charged with premeditated murder in the case.

The decision to put police Lt. Gen. Vinesh Moonoo in charge came soon after word emerged that the initial chief investigator, Hilton Botha, is facing attempted murder charges, and a day after he offered testimony damaging to the prosecution in Pistorius' bail hearing.

Pistorius, an Olympic runner whose lower legs were amputated when he was less than a year old, killed his girlfriend Reeva Steenkamp in the predawn hours of Valentine's Day. He claims he mistook her for an intruder when he shot her through a locked door in a bathroom in his home. Prosecutors say the shooting happened after the couple got into an argument and allege the killing was deliberate, carried out with no mercy.

Botha acknowledged Wednesday in court that nothing in Pistorius' version of the fatal shooting of Steenkamp contradicted what police had discovered, even though there have been some discrepancies. Botha also said that police had left a 9 mm slug in the toilet and had lost track of allegedly illegal ammunition found in Pistorius' home.

"This matter shall receive attention at the national level," Phiyega told reporters soon after the end of proceedings in the third day of Pistorius' bail hearing. The case has riveted South Africa and much of the world and has placed the country's judicial system under close scrutiny.

Bulewa Makeke, spokeswoman for South Africa's National Prosecuting Authority, said the attempted murder charges had been reinstated against Botha on Feb. 4. Police say they found out about it after Botha testified in Pistorius' bail hearing Wednesday.

Botha and two other police officers had seven counts of attempted murder reinstated against them in relation to a 2011 shooting incident. Botha and his two colleagues allegedly fired shots at a minibus they were trying to stop.

Asked about Botha's court performance and handling of the investigation, Phiyega said South Africa's police force "can stand on its own" compared to others around the world.

Makeke, the spokeswoman for the national prosecution office, had said before Botha was dismissed from the Pistorius case that he should be taken off, but added that it was up to the police force to make that decision.

Makeke indicated the charges were reinstated against Botha because more evidence had been gathered. She said the charge against Botha was initially dropped "because there was not enough evidence at the time."