Chauhan, who is the SP of the Special Investigation Cell of the state police, went missing mysteriously from Tippi on Tuesday when he was going to Tawang from Itanagar with inspector Mohan Kaye and constable Vikram Singh.
He had handed over one of his cell phones to his driver while leaving the vehicle at Tippi market and asked them to wait for him at a nearby river where he was supposed to join them for lunch.
IGP (Crime) Arvind Deep yesterday informed that the police had definite clues on Chauhan
