Police are now treating the death of a nine year-old Raetihi boy as suspicious.
Police say preliminary results from tests show prescription medicine in Antony Christensen's system.
The boy's body was discovered by a family member ten days ago.
Detective senior sergeant Keith Borrell says the results are only initial findings and police are not in a position at this stage to say what caused his death.
He says police are still interviewing Antony's family who have been helpful.