"We need to be mindful that regardless of any opinions or anything like that, the key element is the investigation side of things," Victoria Police spokesman Marty Beveridge said. "We need to give the homicide squad detectives the time and space to conduct ourinvestigation."
"We're still awaiting further tests on the boy's body to try and establish the cause of death," Beveridge said.
Gurshan was found dead near Melbourne airport, 6 hours after he was reported missing from his home on Thursday, Mar 4.
Media reports said that the Australian police are considering toxicology tests after the autopsy report failed to shed light on the cause of his death.
Gurshan's parents, mother Harpreet Kaur Channa and father Harjit Singh Channa were interrogated for over five hours by the Victorian police before they could see the body of their son.
A case of asphyxiation and child molestation is also being considered by the Australian police.
Gurshan was on a holiday with his parents when he was found murdered. His mother Harpreet is a student in Australia.