Former Egyptian President Hosni Mubarak is due to learn if he has been found guilty of conspiracy in the killing of protesters during last year's uprising.
A court in Cairo will decide whether Mubarak, as well as his former Interior Minister Habib al-Adly and four aides, ordered police to shoot demonstrators.
All six deny the charges but could face the death penalty if convicted.
Mubarak also faces separate charges of abusing his powers to accumulate wealth, with his sons Alaa and Gamal.
An associate, the tycoon Hussein Salem, is being tried in absentia.
Two other senior interior ministry security officials are accused of failing to anticipate protests and protect public and private property.
Hosni Mubarak is the first former leader to be tried in person since the start of the Arab Spring uprisings last year.