The police said the family members of the ASI have been missing since the matter was reported to them.
"We are looking for his son to ascertain whether it was a murder or suicide," Gurgaon police ACP Manish Sehgal said.
ACP Sehgal said the family members were present when the ASI appears to have died according to the officer's neighbours.
"Prima facie it appears to be a matter of property dispute. However, we are investigating all angles," he said.
A case of murder has been registered against unknown people, he added.