Investigators believe that Jade was buried at the vacant rural property on Dandenong-Hastings road on Sunday 22 October.
It is believed that he was last seen alive on 13 October.
Investigators would like to speak to anyone who saw Jade between 13 October and 22 October or anything of interest at the property or around Dandenong-Hastings road.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or file a confidential report at www.crimestoppersvic.com.au
