"There is something fundamentally wrong with our society," Henke Pistorius said. "We build people up into heroes, who overcome immense challenges, only to take great glee in breaking them down."
Family and friends rallied to Pistorius' defense, saying they believe he shot Steenkamp by accident after he mistook her for an intruder.
"We have no doubt here that there's no substance for the allegations," his uncle Arnold Pistorius said.
Pistorius' best friend, Justin Divaris, told reporters that he received a call from a distraught Pistorius just before 4 a.m. Feb. 14 in which he said there had been a terrible accident, and that he shot Steenkamp.
If convicted, Pistorius could face at least 25 years in jail. A memorial service for Steenkamp will be held in Port Elizabeth Tuesday evening. Her body has been flown back for the service before being cremated, her family told local media.
Speaking with the media for the first time since her daughter's death in a phone interview with The Sunday Times from her home in Seaview, Port Elizabeth, June Steenkamp said, "Why? Why my little girl? Why did this happen? Why did he do this? What for?"