Oscar Pistorius and Other Struggling Ex-Olympians At London 2012, Oscar Pistorius became the first double leg amputee to compete in the Olympics, and he won two gold medals and a silver in the 2012 Summer Paralympics. Pistorius shot and killed his girlfriend, Reeva Steenkamp, on Feb. 14. He says he shot her by accident, mistaking her for an intruder. Gareth Copley/Getty Images