An initial post-mortem has found no traces of narcotics in the system of the ex-policeman who killed 36 people and wounded 10 in Nong Bua Lam Phu on Thursday before taking his own life, said national police chief Pol Gen Damrongsak Kittiprapas.
He said the autopsy, carried out by Udon Thani provincial hospital, indicated that former Pol Sgt Panya Khamrab did not ingest any illegal drugs within 72 hours of his rampage at the childcare facility operated by the Uthai Sawan tambon administrative organisation in Na Klang district.
"A second autopsy will be performed to confirm the result and expel any suspicions because the killer had a history of drug abuse," he said.
