Detectives from the Arson and Explosives Squad are searching for two male witnesses following a fatal house fire in Whittington in January.
The fire occurred at a property on Boundary Road about 8.20pm on 25 January.
A 36-year-old Whittington man died the following day in hospital from burns he received during the fire.
Police subsequently charged a 33-year-old Whittington woman with murder and she was remanded in custody.
The woman will again face Melbourne Magistrates Court on 11 May, 2020.
Police have been told that earlier on the night, two young men walked past the property and had a conversation with the victim and his then 10-year-old son.
It's believed this conversation happened some time between 7pm and 8.20pm.
The men do not have any involvement in the fire and are being treated as witnesses only.
Police have yet to locate the men and are appealing for them to come forward.
The men or anyone else with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au
