Some five months after he was convicted of culpable homicide,
Though the famed double-amputee runner was found guilty in the 2013 shooting death of his girlfriend,
Prosecutors quickly appealed. On Tuesday, Pistorius' attorneys said they would challenge a judge's ruling to allow that appeal.
Pistorius was found to have shot Steenkamp multiple times through a closed toilet door in his South African home. Judge Thokozile Masipa ruled that he did not intend to kill Steenkamp but that he acted negligently.
The 28-year-old Olympic athlete has contended that he mistook Steenkamp for an intruder. Prosecutors claimed the shooting was prompted by a late-night argument.
If the Supreme Court of Appeals finds that he is guilty of murder, Pistorius would face a minimum of 15 years in prison.