Shehzan, Rakhi's son, went missing on Thursday night from outside the Chanakyapuri police station, where he had gone to meet some police officials. Investigators tried calling him on the two mobile phone numbers provided by him, but both were found switched off.
Meanwhile, the police team which is in West Bengal's North 24 Parganas district to trace the families of the deceased maid and another domestic help, Meena, is yet to meet with any success on its mission.
Sources said that when the team reached Rakhi's house, it was found locked from the outside, and neighbours had no idea of the family's whereabouts.
The team is camping at the location and has sought the help of local police to trace the inmates of the house.
A team of three doctors on Friday conducted a postmortem on Rakhi.
Initial report of a post-mortem on the deceased maid suggests she succumbed to the injuries on her body, likely caused by beatings. Her body also bore burn marks and injuries on the chest, stomach, arms and legs.
Singh and Jagriti were arrested on Tuesday in connection with the death of Rakhi and the alleged torture of a minor domestic help.
Rakhi's body, with several injury marks on her legs, chest and arms, was recovered from Singh's South Avenue residence on Monday evening.
The minor domestic help had told police that Jagriti used to regularly beat them up.
The maids were allegedly tortured and thrashed by Jagriti with sticks, iron rods, clothes iron and even metallic deer horns.
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