Sometime before dawn, Pistorius said he awoke, and walking only on his stumps, pulled a fan in from an open balcony and closed it. That's when he said he heard a noise and became alarmed because the bathroom window, which had no security bars, was open and workers had left ladders nearby.
"It filled me with horror and fear," Pistorius said in the statement.
"I am acutely aware of violent crime being committed by intruders entering homes," he said. "I have received death threats before. I have also been a victim of violence and of burglaries before. For that reason I kept my firearm, a 9 mm Parabellum, underneath my bed when I went to bed at night."
Too frightened to turn on a light, Pistorius said, he pulled out his pistol and headed for the bathroom, believing Steenkamp was still asleep "in the pitch dark" of the bedroom.
"As I did not have my prosthetic legs on and felt extremely vulnerable, I knew I had to protect Reeva and myself," he said, adding that he shouted to Steenkamp to call the police as he fired at the closed toilet door.
It was then, Pistorius said, that he realized Steenkamp was not in bed.
He said he pulled on his prosthetic legs and tried to kick down the toilet door before finally giving up and bashing it in with a cricket bat. Inside, he said he found Steenkamp, slumped over but still alive. He said he lifted her bloodied body and carried her downstairs to seek medical help.
But it was too late. "She died in my arms," Pistorius said.
"We were deeply in love and I could not be happier," the athlete said. "I know she felt the same way. She had given me a present for Valentine's Day but asked me only to open it the next day."