Calcutta, Nov. 12 :    Calcutta, Nov. 12:  Sabita Biswas, mother of Soumitra Biswas, who was found hanging under mysterious circumstances in the RG Kar Medical College and Hospital hostel at Belgachhia almost three months ago, blamed his friends for the death. . My son returned home as he could not tolerate the indecent activities of his close friends. But on August 24, the day before his death, his friends called him back to the hostel for a truce,. said Sabita. On August 25, Soumitra's body was found hanging from the ceiling of his hostel room. . I was shocked when Soumitra's friends refused to talk to me and stopped others from doing so,. added Sabita. DCDG Soumen Mitra, however, said: .According to evidence, the incident was not a case of homicidal hanging. Though we have started a murder case on the basis of the mother's complaint, we have to wait for the postmortem report..