From the article:
The torture process starts once a demonstrator who opposes President Mohammed Morsi is arrested in the clashes or is suspected after the clashes end, and the CSF separate Morsi’s supporters from his opponents. Then, the group members trade off punching, kicking and beating him with a stick on the face and all over his body. They tear off his clothes and take him to the nearest secondary torture chamber, from which CSF personnel, members of the Interior Ministry and the State Security Investigations Services (SSIS) are absent.
After a while, the detainee is transported from the secondary torture chamber to the central one. On his way, the beatings and insults continue. Every time the prisoner encounters a member of the Brotherhood, that person gets in his share of the insults and beatings. They also may collectively insult him before he enters the central room, while a Brotherhood lawyer hands over his national ID card, his funds and his belongings to the SSIS chief. Some members of the group claim to have seized weapons from the detainee and handed them over to the officers at al-Nozha police station. However, we were unable to verify that.
The health conditions of some of the prisoners was very bad and they were unable to answer questions. Some of them were bleeding all over their bodies, severely exhausted and not receiving any medical aid. However, some got a bottle of water to drink or something to use to stop their bleeding.