Three members of former Burkina Faso ruler Blaise Compaore's presidential guard went on trial on Monday accused of murdering a student union leader in 1990.
Boukary Dabo led the West African country's national student association which spearheaded protests against Compaore's iron fisted rule that only ended with a popular uprising in 2014.
The medical student was kidnapped by armed men on May 19, 1990, and taken to the main camp run by a presidential security regiment.
Dabo was tortured there and buried at Po, 150 kilometres (90 miles) from the capital Ouagadougou.
The accused are charged with being "complicit in an illegal arrest and aggravated abduction... in beatings and injuries that led to death without intention to murder".
They are also charged with concealing a body.
Chief among the defendants is General Gilbert Diendere, who is serving a life term for his role in the assassination of president Thomas Sankara in a 1987 putsch that brought Compaore to power.
The general is also accused of ordering the removal and burial of the student's body.
Co-accused Mamadou Bamba is known for having read out on television a statement from attempted coup leaders who failed to seize power in 2015.
He is also alleged to have decided which students to arrest.
Bamba was in court Monday and pleaded not guilty to the charges.
Diendere is expected to appear on Tuesday.
The third defendant, Sergeant Magloire Yougbare, is being judged in absentia.
He is also accused of driving the vehicle used to transport the body.
Although investigations began in 2000, it was only after a popular uprising led to the fall of Compaore's regime that charges were finally brought in January 2017.
The same year, the authorities announced that Dabo's remains had been found in Po, site of a commando force centre where Compaore guards were trained.
Burkina Faso is currently ruled by a junta under Lieutenant-Colonel Paul-Henri Sandaogo Damiba.
He took power in a January coup, ousting elected leader Roch Marc Christian Kabore, who failed to stem a jihadist insurgency.
The trial verdict is expected on Wednesday.
