PRETORIA, South Africa — Paralympic superstar Oscar Pistorius was charged Thursday with the murder of his girlfriend who was shot inside his home in South Africa, a stunning development in the life of a national hero known as the Blade Runner for his high-tech artificial legs. Reeva Steenkamp, a model who spoke out on Twitter against rape and abuse of women, was shot four times in the predawn hours in the house, in a gated community in the capital, Pretoria, police said. Hours later after undergoing police questioning, Pistorius left a police station accompanied by officers. He looked down as photographers snapped pictures, the hood on his gray workout jacket pulled up, covering most of his face. His court hearing was originally scheduled for Thursday afternoon but has been postponed until Friday to give forensic investigators time to carry out their work, said Medupe Simasiku, a spokesman for the prosecution. Police said there was a recent history of problems involving him. Police spokeswoman Brigadier Denise Beukes said the incidents included "allegations of a domestic nature." "I'm not going to elaborate on it but there have been incidents (at Pistorius' home)," Beukes said. Police in South Africa do not name suspects in crimes until they have appeared in court but Beukes said that the 26-year-old Pistorius was at his home at the time of the death of Steenkamp and "there is no other suspect involved." Pistorius' father, Henke, declined to comment, only saying "we all pray for guidance and strength for Oscar and the lady's parents." Neither Pistorius' agent Peet van Zyl nor coach Ampie Louw could be reached while Pistorius' own cellphone went straight to voicemail. Police said that earlier reports that Steenkamp may have been mistaken for a burglar by Pistorius did not come from the police. Several local media outlets initially reported that the shooting may have been accidental. Capacity Relations, a talent management firm, earlier named model Steenkamp as the victim of the shooting. Police spokeswoman Lt. Col. Katlego Mogale said that officers received a call around 3 a.m. after the shooting. A 9 mm pistol was recovered and a murder case opened against Pistorius. A model, a law school graduate and an entrepreneur Steenkamp was to give an inspirational talk Thursday at a Johannesburg school. Steenkamp had become a celebrity in her own right, said Publicist Sarit Tomlinson. She was one of FHM magazine's 100 Sexiest Women in the World for two years running, appeared in international and South African advertisements and was a celebrity contestant on Tropika Island of Treasure filmed in Jamaica. She was also the South African face of Avon cosmetics. On Twitter, Steenkamp tweeted messages urging women to stand up against rape as well as her excitement about Valentine's Day. "What do you have up your sleeve for your love tomorrow?" she tweeted. "It should be a day of love for everyone." — Agencies