The postmortem conducted into the death of Sargent Major who committed suicide saying that he is responsible to the murder of Lasantha Wickrematunga, has found that it was a death by hanging. Kegalla Police and the CID jointly conducted the investigations into the death. The Sargent Major has committed suicide after writing a letter. The letter states that he murdered Lasantha Wickrematunga and he has requested to release Premananda Udalagama who is in custody at present. The deceased has requested that the letter be given to the Intelligence Unit. Judicial Medical Officer of Kegalla General Hospital Dr. Ramesh Alagiyawanna conducted the postmortem. Several teams of the CID are conducting investigations into the death.