Oscar Pistorius is being sentenced in South Africa today for the 2013 shooting death of his then-girlfriend, model Reeva Steenkamp. Last month, Judge Thokozile Masipa found the double-amputee athlete not guilty of murder, but guilty of culpable homicide. Pistorius, 27, did not dispute that he shot and killed Steenkamp. However, Pistorius argued that he believed she was an intruder when he shot her through a locked bathroom door at his home in Pretoria in the early-morning hours of Feb.