Metropolitan Magistrate Sandeep Garg extended by 14 days the judicial custody of Namdhari, his PSO Tyagi, his aides Simranjeet Singh and Jagbir Singh and six others after they were produced in the court through video conferencing.
The police told the court the accused were not physically produced from jail before it due to security reasons.
The court also extended the judicial custody of accused Bhupender Singh, Uday Raj Singh, Rajpal Singh, Anand Singh Bisht, Mathura Singh Mehra and Satnam Singh, till January 10.
The Crime Branch of Delhi Police had booked Namdhari for allegedly killing Ponty Chadha's younger brother Hardeep. The accused were produced through video conferencing after expiry of their earlier judicial remand.
Tyagi, a constable with Uttarakhand Police since 2005 and deployed as Namdhari's PSO since January 2012, was also arrested for his alleged role in the crime.
Ponty and Hardeep, who had an ongoing property dispute, were killed in a shootout at their Chattarpur farmhouse in New Delhi on November 17 afternoon, after which the police has arrested altogether eight persons including Tyagi and Namdhari in various criminal cases linked to the incident.
All the accused have been booked for allegedly committing offences of hatching criminal conspiracy, attempt to murder, dacoity, assault, Arms Act, destruction of evidence, trespass, illegal confinement and kidnapping.
The police, however, has booked Namdhari on charges of murder. The police had told the court that from the probe, it has been established that Namdhari has played a vital role in the conspiracy with other co-accused, who acted on his orders.
The police had also told the court that during the probe, Tyagi had disclosed about his involvement in the conspiracy of trespass and that he along with Namdhari, had shot at Hardeep as per a plan hatched earlier among him, Namdhari and Ponty.
It had said Namdhari had brought with him a number of associates armed with weapons, hockey sticks and baseball bats to facilitate forcible possession of the Chattarpur farmhouse.
Namdhari's associates help him run his various businesses in Uttar Pradesh, Uttarakhand and Punjab.
In this regard two criminal cases, one of forcible dispossession of the farm house in which Hardeep was murdered and the other of murder of Ponty, were registered by the police.
Earlier, the court had also issued non bailable warrants against eight men, all belonging to Bareilly, for January 28 after the Crime Branch had submitted to it that they were still on run and were wanted for their alleged roles in killings of Ponty and Hardeep.
The eight against whom the NBWs were issued are Hardayal Singh, Satnam Singh, Baj Singh, Balkar Singh, Pargat Singh, Kulbir Singh, Bakshish Singh and Dharmender.
A .315 bore rifle with seven cartridges and a 12 bore double barrel (DBBL) gun with 10 live cartridges were seized from accused Simranjeet and Jagbir's possession.