Even Tihar Jail inmates couldn't stand the horror of the Delhi bus gangrape case . This came to light when the inmates beat up Mukesh, the main accused in the Delhi bus gangrape case, in the jail. Sources in the jail said Mukesh was also forced to consume human excreta and urine.After the attack , jail authorities have decided to lodge him separate from other inmates.The victim's male friend, who was beaten up by the accused bus crew, identified Mukesh in the test identification parade (TIP). The identification would help police in establishing that the other accused were also with him.The 23-year-old paramedic student was raped and badly beaten up in a moving bus while she was returning home in Mahavir Enclave area on Sunday night. Her friend had tried to rescue her but he too was badly thrashed by the accused. The duo was then stripped and dumped in Vasant Vihar area. They were consequently hospitalised by the police and the girl's condition has still been critical.Police arrested four people in connection with the rape. Main accused Ram Singh, who was the driver of the bus, and his accomplices Vinay and Pawan have been on police remand while his brother Mukesh was sent to two-week judicial custody on Wednesday.During their court appearance on Wednesday, only Mukesh had agreed to the TIP. Vinay and Pawan had confessed to being part of the gang and said there was no need for their participation in the TIP. In fact, Vinay had said that he was ashamed of his crime even as he claimed that he did not rape the girl. Admitting to beating her friend, he had said he should be hanged for his act.