dhanbad an employee of bharat coking coke limited bccl om prakash chauhan committed suicide on monday morning after killing his wife two children and sisterinlaw the incident came to light when in laws of chauhan visited his house in barora under the same police station area and found the door locked from inside after knocking for some time when no one opened the door they somehow got into the house with the help of locals where they found the dead bodieschauhan was employed in block2 colliery of barora and used to live in companys quarter with his wife suman devi 30 son piyush 11 and harshit 8 his sisterinlaw nitu kumari 20 was doing a beautician course in fusro which is near to chauhans place and used to visit his place frequently according to locals chauhan was into illicit relationship with nitu over which his wife used to quarrel with him very oftenthe matter was immediately reported to police after which ssp manoj ratan chothey along with rural sp h p janardanan and his team reached the spot and sent all the bodies to pataliputra medical college hospital pmch for autopsy rural sp while speaking to media said that prima facie it seems that all the deceased were poisoned after inspecting the crime spot he also suspected that wife must have been killed a day or two before and children and his sisterinlaw were killed on sundaypolice launched a hunt for chauhan and the team raided many places to nab the culprit on monday early in the morning chauhans body was found on a railway track near godhar the body was then sent to pmch for post mortem janardanan told toi that the case is almost closed however on the basis of post mortem reports necessary formalities would be done after investigation a charge sheet would be filed for the four murders and a case of unnatural death will be done as the culprit has committed suicide