The trial is resuming in Guinea of the men accused of being behind a stadium massacre more than a decade ago in which over 150 people died.
The former military leader, Moussa Dadis Camara, and his co-defendants are facing charges of crimes against humanity, which they deny.
The security forces have been accused of murdering, raping and torturing people involved in the opposition protest in the stadium in Conakry in 2009.
Observers say the trial poses a challenge for the justice system, given the high profile of the defendants and the lack of experience of Guinea's judiciary.