Police were on the lookout for Deepak as his name had emerged as one of the key conspirators during investigation.
The constable, Dharampal, was shot dead in a busy market place in Northeast Delhi’s Jaffrabad area on September 27.
The High Court had last month asked police to give an analysis of data regarding crimes against women.
A case of murder and destruction of evidence has been registered against the three.
The suspects, who were around three to four in number, then opened fire on both the constables from close range and fled, police said
The 70-year-old bomb expert was brought from Tihar jail to the court premises here amid tight security.
According to police, between January 1 and September 30 this year, 5,841 minors have been reported missing.
For the first 24 hours after she went missing, it was only the family who searched for the child.
On September 28, Jahnvi, her parents and a few neighbours from their colony had decided to spend the day at India Gate.
After the resident identified Jahnvi, police officers rushed to the spot and informed their senior officers.
Posters with the girl’s photo, requesting help from people to trace her has gone viral on social networking websites.
The officers removed the rubble outside Tilak Marg station.
The official said Singh has asked Commissioner B S Bassi to oversee that the aim of the “Swachh Bharat” mission is achieved by Delhi Police.
He and 17 others have been charged under various sections including molestation.
Gorakh Nath, a worker at the press where the paper was printed, sneaked out a copy after hiding it in his shoe, say police.