Olympic and Paralympic sprinter Oscar Pistorius started his five-year jail sentence Tuesday for killing his girlfriend Reeva Steenkamp, marking the end of a trial that has gripped South Africa and millions around the world.

His uncle, Arnold Pistorius, indicated he would not appeal.

As judge Thokozile Masipa gave her decision on the 27-year-old's culpable homicide conviction, Pistorius, whose downfall has been likened to that of NFL star O.J. Simpson, stood resolutely in the dock.

His only reaction was to wipe his eyes before two police officers led him to the holding cells beneath the high court in the South African capital.

Ninety minutes later, an armored police vehicle carrying Pistorius -- still dressed in dark suit, white shirt and black tie -- left the building through a throng of reporters toward Pretoria Central Prison, where he is expected to serve his time.