PRETORIA, South Africa (CNN) — South African sports icon Oscar Pistorius broke into tears Friday when a judge officially charged him with killing his girlfriend on Valentine's Day.
A grim-faced Pistorius, dressed in a dark suit, shook uncontrollably with his head buried in his hands during the hearing at a packed courtroom in Pretoria.
Prosecutors say they plan to charge him with premeditated murder.
The athlete rejected the murder allegation "in the strongest terms," his agent, Peet Vanzuyl, told CNN.
His girlfriend, model Reeva Steenkamp, was found in a pool of blood at his home Thursday in an upscale neighborhood in the capital.
Neighbors alerted authorities to the early morning shooting, saying they had "heard things earlier," according to Denise Beukes, a police spokeswoman. She did not clarify what the neighbors heard.
The track star was arrested the same day.
Local media reported that he had mistaken his girlfriend for an intruder, but the spokeswoman said those reports did not come from authorities.
There was no evidence of forced entry at the home, she said.
Police gave no motive for the fatal shooting, but said there had been previous "allegations of a domestic nature" at his house. They did not provide details.
A pistol was recovered at the scene, police said.
South Africa has a high crime rate, and many homeowners keep weapons to ward off intruders.
"There are 1.5 million gun owners -- about 3.5 million guns in civilians hands," said Alan Storey, chairman of Gun Free South Africa.
Most of the victims of gun homicides are between the ages 20 and 30, according to Storey, who said such deaths are rampant in the nation of about 50 million.
"This tragedy is not more important than others, it is just because of the people involved," he said.
Storey said the nation has tough legislation that includes a requirement for a thorough background check for prospective gun owners. The check includes spouses and partners, and is repeated every few years, he said.
"People acquire guns believing they are more safe ... but they place themselves at great risk," Storey said. "We've made airplanes a gun-free zone. We need to bring that logic down to earth."
But the South African Gunowners' Association, a popular gun lobby group, has said citizens have the right to protect themselves from increasingly violent crimes.
"There are already more than enough laws and regulations to control the possession of firearms by private citizens," it says on its website. "Fewer and less complex laws reasonably, yet properly, applied could achieve the required objective."
From hero to murder suspect
As the shocking allegations reverberated worldwide, stunned South Africans grappled with the news of their fallen hero.
When Pistorius was a toddler, his legs were amputated below the knees because of a bone defect, and he runs on special carbon fiber blades. He became the first Paralympic sprinter competing against able-bodied athletes at the London Olympics last year.
His athletic prowess and prosthetics earned him the nickname "Blade Runner."
South Africans jubilantly cheered him on at the time as his face became a fixture on billboards across the nation.
By Thursday, some of the billboards started coming down.
His sponsors followed suit.
Nike pulled an ad featuring him from its website. It showed him taking off for a run, and the words "I am the bullet in the chamber."
Other Pistorius sponsors -- including prosthetics manufacturer Ossur, British Telecom, and Oakley, which makes sunglasses and other products -- expressed condolences and said they had no further comment.
The sports icon appeared in headlines across the nation, overshadowing the State of the Union address by President Jacob Zuma.
"Golden Boy Loses Shine," blared a headline on the front page of the Sowetan.
The Pretoria court postponed Pistorius' bail hearing to Tuesday and ordered him to remain in custody until then. Prosecutors will argue that he committed premeditated murder.
Authorities said they will oppose bail, but did not provide their reasons for the decision.
He shattered barriers
The double amputee's London Olympics appearance triggered controversy, as some said the prosthetic limbs gave him an advantage.
Pistorius was initially refused permission to enter the Olympics, but he hired a legal team to prove that his artificial limbs did not give him an unfair advantage, and was allowed to compete.
While he did not win a medal, his presence on the track was lauded as an example of victory over adversity and dedication to a goal.
In the 2012 Paralympic, held a few weeks after the Olympics, he smashed a record to win the men's 400-meter in the final athletics event of the Games.
In October, he discussed the "massive blessing" of inspiring people around the world.
"Being an international sportsman, there's a lot of responsibility that comes with that," he told CNN's "Piers Morgan Tonight."
CNN's Robyn Curnow reported from Pretoria and Faith Karimi reported from Atlanta. CNN's Josh Levs and Marilia Brocchetto contributed to this report.
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By Robyn Curnow and Faith Karimi