Former Congolese rebel leader Bosco Ntaganda is due to appear at the International Criminal Court in the Hague.
He is accused of committing war crimes in the eastern Democratic Republic of Congo a decade ago.
Bosco Ntaganda, who denies the charges, surrendered at the US embassy in Rwanda last March as the Congolese M23 rebel movement was fracturing.
The hearing will help judges decide if there is enough evidence to try him.
He was once one of the ICC’s most wanted suspects, accused of using child soldiers, keeping women as sex slaves, and murder.
When he appeared in the Hague soon after his surrender, he pleaded not guilty, before the judge interrupted him and said he should not enter a plea at this stage.
Gen Ntaganda has fought for a number of rebel groups as well as the Congolese army.
He was believed to be one of the leaders of the M23 rebel movement, but the seven counts of war crimes and three counts of crimes against humanity he faces relate to his involvement with a different rebel group – in the Ituri region of DR Congo, between 2002-2003.