Clashes broke out in Cairo's Tahrir square on Friday, but it was actions the security forces took to stop the protests which have shocked Egyptians. A 23-year-old man was brutally beaten and killed, and it was caught on live television. Video footage shows a man being stripped naked and beaten by security forces before being bundled into a van. The actions of the police forces were condemned by the Interior Ministry calling it an 'isolated incident', but Egypt's main opposition has voiced its support for protesters calling for the end of the regime and Muslim brotherhood's control. Al Jazeera's Erica Wood reports.