So far, police have arrested four persons in the case namely Azad Rajhbhar, Pradeep Rajhbhar, Vijay Rajhbhar and Shivkumar Rajhar alias Sadhu.Rajbhar was detained in Varanasi and was brought to Mumbai on Wednesday morning. Also, it will shed light on the involvement of Hema's estranged husband Chintan Upadhyaya, if any, in the murder, police said.A hunt was launched for Vidyadhar soon after detention of Sadhu by the UP Special Task Force in Varanasi on Monday following a request by Mumbai police.According to police, the trio along with two other accused -- Sadhu and Vidyadhar-- had killed the artist and her lawyer.The tempo driver had claimed that he was unaware of the contents inside the boxes.

Except Sadhu, who was detained in Varanasi on Monday, the remaining three were picked up from Kandivali on Sunday.On Wednesday, the trio was remanded to police custody till December 19. These boxes along with other details including call records of Hema led police to a fabrication shop (run by Vidyadhar) near Borivali where the accused were based, a senior police official said."Interrogation of Sadhu--the fourth to be arrested in the case--is likely establish the roles of each of accused in the killings.Sadhu had gone public with the claim that the two were killed under instructions from Vidyadhar. He has been arrested and shall be produced in the court shortly, added Bharti.The boxes were generally used for transporting idols.Bodies of noted installation artist Hema (43) and her lawyer Harish Bhambhani (65) packed in cardboard boxes were found in a drain in Kandivali on Saturday.Vijay Rajbhar was the person who allegedly ferried the cardboxes containing the bodies of the deceased in China low-pressure injection molds Manufacturers a tempo from the warehouse of Vidyadhar in Kandivali (W)..

Based on leads provided by the three during their sustained questioning, teams of Mumbai Police have been dispatched to various locations in and outside Maharashtra to nab Vidyadhar, who used to make the material required by Hema for her work.Hema, a Baroda-born painter, was locked in bitter divorce proceedings with her husband Chintan. Mumbai: Two days after he was detained in the double murder case of artist Hema Upadhyaya and her lawyer, the Mumbai Police on Wednesday formally arrested Shivkumar Rajbhar alias Sadhu even as the prime accused Vidyadhar Rajbhar still remains at large. Bhambhani had represented Hema in this case.The three arrested accused are in the business of manufacturing and selling fibre glass used by Hema and Chintan for their installations. On Tuesday, the trio — Azad, Pradeep and Vijay — were placed under arrest after being booked under IPC sections 302 (murder), 201 (causing disappearance of evidence of offence, or giving false information to screen offender) and 34 (acts done by several persons in furtherance of common intention). Their bodies were wrapped in plastic and stashed into two separate cardboard boxes before being dumped there.

According to police, the three accused — Azad, Pradeep and Vijay — were tracked down on the basis of manufacturing details and batch number of the cardboard boxes which were used for disposing the bodies of the killed duo.On whether there was any headway in the investigations and whereabouts of Vidyadhar, Bharti said, "Our probe is still on and we have just got a few insights about the crime.She had in 2013 filed a case against him alleging that he painted obscene pictures of women on the walls of their matrimonial home in Mumbai to harass her. We don't have complete details about the way in which the crime was carried out and which of the arrested and wanted accused have played what type of role.Sadhu was brought to Mumbai on Wednesday morning by a team of Mumbai Police which had gone to Varanasi and detained him, JCP (Law and Order) Deven Bharti said. (Photo: PTI) Rajbhar was detained in Varanasi and was brought to Mumbai on Wednesday morning