"No matter how bad the situation was, Oscar always stayed calm and positive," Giannini told the Associated Press in Italy. "Whenever he was tired or nervous he was still extremely nice to people. I never saw him violent."
Yet Pistorius had troubles in his personal life. In February 2009, he crashed a speedboat he was piloting on South Africa's Vaal River. Witnesses said he had been drinking before the crash and officers found alcoholic beverages in the wreckage, although they acknowledged at the time they hadn't conducted a blood test on the athlete. Pistorius broke his nose, jaw and several ribs in the crash, damaged his eye socket and required some 180 stitches to his face.
In November, Pistorius also found himself in an altercation with a local coal-mining millionaire over a woman, South African media reported. Eventually, the two men involved the South African Police Service's elite Hawks investigative unit before settling the matter.
Pistorius owned firearms and posted a photograph of himself at a shooting range in November 2011 to Twitter, bragging about his score.
"Had a 96% headshot over 300m from 50shots! Bam!" he tweeted.