He had been dragged behind a police van , after having been handcuffed to its rear , for about 500 metres .
A preliminary post-mortem report released by South Africa 's Independent Police Investigative Directorate indicated that Macia had died in police detention with head injuries and internal bleeding .
Macia had been dragged behind a police van , after having been handcuffed to its rear , for about 500 metres .
A preliminary post-mortem report released by South Africa 's Independent Police Investigative Directorate indicated that Macia had died in police detention with head injuries and internal bleeding .