The ruling was considered final and could see the Mubarak walk free.
In November 2014, the criminal court retrying Mubarak acquitted the former president and all co-defendants of killing protesters, reasoning that the prosecution's initial decision on 23 March, 2011 to charge Mubarak lacked the legal basis to bring a criminal case against him. "Unfortunately the blood of our family was lost in vain.they're in a better place than we are now", said Mahmoud. "This ruling is not fair and not just".
Many Egyptians view Mubarak's rule as autocratic and riddled with crony capitalism.
Sisi served as Mr Mubarak's military intelligence chief and led the military's overthrow of his democratically elected successor, Mohammed Morsi, in 2013.
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Sisi has since launched a crackdown on Mursi and his Muslim Brotherhood, which has been banned as a terrorist organization. Later he exchanged smiles and winks with a dozen or so supporters in the courtroom, including his two sons - Gamal, who was once groomed to succeed him, and Alaa.
Earlier during the trial, Mubarak, who was sitting in a wheelchair, denied the charge saying, "It did not happen".
Mubarak, 88, has spent most of his time in a military hospital since his arrest in 2011.
A source with knowledge of the matter said that although Mubarak was free to go home, he preferred to remain at the military hospital, under constant medical supervision.