PRETORIA, South Africa (AP) -- Olympic runner Oscar Pistorius says he's sorry for the shooting that took the life of his girlfriend Reeva Steenkamp.
Pistorius apologized to Steenkamp's family at the beginning of his testimony at his murder trial today in Pretoria, South Africa.
With a shaking voice, Pistorius said, "There hasn't been a moment since this tragedy happened that I haven't thought about your family."
The double-amputee athlete said he wanted to protect Steenkamp. He has said he killed her by mistake; prosecutors say he killed her after an argument.
Pistorius also says he is taking anti-depressant medicine and that he has sometimes wakes up in terror, suffering from panic attacks.