The order appointing PI Kathe as the in-charge of the CIU was signed by Joint Commissioner of Police Milind Bharambe on Tuesday.
The police said the three were seen leaving the party at around 1:45 am and were heading down from the stairs.
Three persons have been injured after being allegedly beaten up by members of a rival team following a dispute over a local cricket match.
They would call the borrowers by posing as executives from these firms and offer to settle their loans for much less than the outstanding amount, he said.
The deceased had been living with the accused, a carpenter, since the last 12 years, an official said, adding that the couple recently shifted to central Mumbai.
The complainant woman had worked as a caretaker for surrogate mothers in Pune in the year 2011-12 and knew some of them, the official said.
A case of murder was registered and the victim was subsequently identified as Paras Gupta, a resident of Samata Nagar in Kandivali, the official said.
The CCTV footage of the area around Dena Bank was being checked to nab the culprits, a Vakola police station official said.
Giving details of his case, the official said the accused had assured a teenaged boy, who got separated from his family, that he will help in finding his father.
The scam came to light when ratings agency Broadcast Audience Research Council filed a complaint through Hansa Research Group, alleging that certain television channels were rigging TRP numbers.