The Goa vacation reporting is a staged setup planned & executed by the kidnappers.
When Arjun flees from the kidnappers, they quickly activate Plan B, which includes wiping out all the traces/evidences of the crime, keeping in mind the predictable moves of Arjun :
- Her father was already informed about the kidnaping. Actually there were additional guys with her father in the living room even before everyone arrives to the ECR bunglow. He was thretened to inform so. So the Goa vacation was a cover up planned by the kidnappers.
- The appts gets cleansed, thanks to the inspector for buying them time by leisurely introgating Arjun at the police station.
- The watchman bribed or forced to come in terms with them.
- Video surveilence camera footage is tampered
And the inspector keeps a thrid eye over all this, while monitoring the moments of Arjun by taping his cell phone.
Actually in the 2nd half Arjun does the same/similar moves. He instructs Annamika to make false intentional call, he makes himself predictable to divert the police, he bribes few innocent people as a prey for the chasing cops & finally crossing playing with the actually transmission camera over the cell phone transmission to make the Minister confess.