Muslim Brotherhood to join mass Egyptian rallies Egyptian protesters shouting slogans against former President Hosni Mubarak in Tahrir square in Cairo on June 2012. CAIRO, June 4 (UPI) -- The Muslim Brotherhood said it would take part in demonstrations Tuesday to call for a retrial for those acquitted of killing demonstrators in 2011. A court in Cairo last weekend sentenced former President Hosni Mubarak and former Interior Minister Habib El Adly to life in prison for their involvement in the death of at least 800 civilians during last year's revolution. Public reaction turned sour after it was announced that six former police commanders were cleared of murder charges during the hearing. Mukhtar Ashri, a legal official with the Muslim Brotherhood's Freedom and Justice Party, described the sentencing as unjust. "It is legally illogical to sentence Mubarak and Adly to life in prison, which goes to prove that they did give orders to kill, and at the same time acquit their senior officials responsible for implementing those murderous orders on the ground," he said in a statement. Mahmoud Ghozlan, a spokesman for the Muslim Brotherhood, called for a retrial as he announced the organization would take part in demonstrations scheduled for Tuesday. "First and foremost amongst the demands of this demonstration are retrials for the old regime and its cronies, with proper, strong evidence," he said in a statement. The Muslim Brotherhood's presidential candidate, Mohamed Morsi, squares off against Ahmed Shafiq, the last prime minister to serve in the Mubarak administration, in a runoff election this month.