Mohamed ElBaradei, the Nobel laureate who quit the Egyptian Cabinet in protest over last week's bloodshed, faces being hauled before the courts after being accused of a "betrayal of trust".
ElBaradei was a co-leader of the National Salvation Front (NSF), a coalition of liberal and secular forces which joined the nationwide demonstrations against the deposed President Mohammed Morsi.
The former head of the UN nuclear agency, ElBaradei - supported by figures within the liberal elite but unloved among many ordinary Egyptians - initially endorsed the popular coup that swept Morsi from power on July 3.
ElBaradei even went so far as saying the military intervention had "relaunched" the revolution that toppled Mubarak in February 2011.
But a little over a month later, his political fortunes drastically changed. Last Thursday, following the massacre of several hundred Islamists by armed police in eastern Cairo, he resigned as Vice-President.