Oscar Pistorius' case is being heard by South Africa's Supreme Court of Appeal, where prosecutors are again pushing for a murder conviction against the double-amputee athlete for shooting his girlfriend.

Prosecutors and Pistorius' defense lawyers present arguments Tuesday to a panel of five judges, who will decide if Pistorius' manslaughter conviction should stand or if it should be changed to a more serious murder conviction. The judges could also order another trial.

Prosecutors say a judge made an error at Pistorius' trial last year when she acquitted him of murder for killing Reeva Steenkamp. Pistorius was instead found guilty of culpable homicide, a charge comparable to manslaughter, and sentenced to five years in prison.

The Olympic runner, who is currently under house arrest, was not at Tuesday's hearing.