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.
A case of murder has been registered against unknown people, he added.
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