According to South African news reports, Pistorius told the Steenkamps in the silent courtroom, "I wake up every morning and you're the first people I think of, the first people I pray for. I can't imagine the pain and the sorrow and the emptiness that I've caused you and your family."
He said, "I was simply trying to protect Reeva. I can promise that when she went to bed that night, she felt loved. I've tried to put my words on paper many, many times to write to you. But no words will ever suffice."
Pistorius, who discussed his mobility issues, also said he is taking anti-depressants. "I'm scared to sleep, I have terrible nightmares, I can smell blood and wake up terrified," he said.
State prosecutors charge the murder was premeditated. Pistorius insists he mistook Steenkamp for an intruder.