The retrial of Alija Osmic, who is charged with crimes in Bugojno in 1993 and 1994, begins with the reading of the indictment and hearing statements given by two State Prosecution witnesses.
Courts in Bosnia increasingly rely on guilt pleas to speed up trials secure verdicts but many victims groups feel justice is being sacrificed in the name of expediency.
The Court of Bosnia and Herzegovina will render a verdict on June 8 against Osman Sego for crimes committed against Croat detainees in Bugojno in 1993, after he reached a plea deal with the prosecution.
Critics charge State Prosecutors office with keeping hold of low-ranking cases that should go to lower courts - slowing the work of resolving Bosnias top war crimes by 2015 deadline.