The trial of former Egyptian President Hosni Mubarak is due to resume in the capital, Cairo. It was adjourned for a day after scuffles broke out in court on Monday between his supporters and opponents.
The 83-year-old is accused of ordering the killing of protesters during the uprising earlier this year which ended his rule. He denies the charges.
One of the first witnesses denied that Mr Mubarak's interior minister gave orders to shoot protesters.
Photo burned Wednesday's hearing will be the fourth of the trial.
On Monday, the prosecution called on four senior police officials who were expected to give evidence about Mr Mubarak's role in the crackdown.
But he said he had never heard of "any incident where an order was given to use live ammunition against protesters", Reuters news agency reports.
Emotions were running high outside the court during Monday's hearing, with some people chanting in favour of Mr Mubarak and others were saying he should hang.
There were even scuffles inside the court: someone raised a photo of the former president - which was then seized and burnt.
At earlier court hearings, TV images showed Mr Mubarak, who led Egypt for 30 years, in a cage on a sick bed. The footage made compulsive viewing for people across the Arab World.
But the presiding judge later banned live TV coverage.
During the 18-day uprising in Cairo's Tahrir Square in January and February - during which 850 people were killed.
The victims' families want to know what orders Mr Mubarak gave to his officials as police tried to stop the mass protests that resulted in the president's resignation on 11 February.
The trial of Mr Mubarak and his sons Gamal and Alaa has been merged with that of former Interior Minister Habib al-Adly, who is also accused of ordering the killing of protesters.
All the defendants deny the charges.