KOLKATA: Happy Singh a key accused in the Khadim boss abduction case was murdered inside Presidency jail on Monday morning. During the exercise session inside the jail Singh was attacked by another prisoner Nizamuddin who hit Happy Singh with a brick and smashed his head after an altercation. Singh died on the way to hospital. Doctors at MR Bangur hospital declared him brought dead. The Khadim boss Partha Roy Burman was abducted in 2001 and Happy Singh had been instrumental in his abduction and had also opened fire during the abduction. The gang that had abducted the shoe baron had released him after a reported ransom of Rs 3.75 crore was paid through hawala channel. Roy Burman was abducted from Tiljala near his factory on July 23, 2001 and was kept in captivity in a house in North 24 Parganas for a week. However, Roy Burman during his examination before the court had said that he could not remember any thing nor he could recall where he was kept in custody and had feigned forgetful. Roy Barman's turning hostile during the hearing have affected the trial and he also denied having paid any ransom. Earlier in 2009, Aftab Ansari, a Dubai-based don along with four others were sentenced for life by judge Biswarup Banerjee. Harpeet Singh alias Happy Singh was also sentenced for life in this abduction case. The others were Abdul Rahaman Kunji, Akib Ali and Sauqat. Adhir Sharma, ADG (Prisons) have asked for a high level probe. How the breach of security took place for Happy Singh and that too inside the jail have surprised many. It is being probed if Nizamuddin was specially entrusted to kill Happy Singh, as he belonged to a high risk category of prisoners. The role of the jail wardens are also under question as they reportedly did not do anything to prevent Nizamuddin from constantly assaulting Happy Singh with brick. Moreover, the jail officials are trying to find out how the brick reached that area, where high risk prisoners are kept.