CAIRO — An Egyptian fact-finding mission determined that Hosni Mubarak watched the uprising against him unfold through a live TV feed at his palace, despite his later denial that he knew the extent of the protests and crackdown against them, a member of the mission said Wednesday.

The mission’s findings increase pressure for a retrial of the 84-year-old ousted president, who is already serving a life sentence for the deaths of 900 protesters. But its report could hold both political gains and dangers for his successor, Mohammed Morsi.