Days after a retired NSG commandant was robbed at gunpoint at his home in Chawri Bazaar, police said four people, including a jewellery businessman, were arrested in the case.According to police, the businessman, Mohammad Kaif, was allegedly miffed after the 86-year-old victim, Bhim Sen — now a diamond and gems artisan — ended their business partnership.The other accused were identified as Aloknath Mishra, 35; Sohail Malik, 23; and Waseem, 48; police said.The incident took place on July 19 when Sen was at his house — which also doubles up as his office — along with his son Sandeep, daughter-in-law Neelam, and grandson. “A man knocked on the door and called out the name of a family member. As soon as the door was opened, three masked assailants, armed with weapons, forced their way inside,” a police officer had said earlier.When the grandson resisted, one of the masked men took out a gun and tied his hands before taping his mouth, the officer had said.The intruders then looted jewellery and precious stones worth Rs 50 lakh, while also taking $3,550. They locked the family in the kitchen before fleeing.Also Read | Delhi: NSG jawan killed in hit-and-run in R K Puram, man arrestedDCP (North) Raja Banthia said, “Through sustained surveillance and intelligence analysis, it was established that three individuals were involved in the crime. These individuals were observed regrouping near Chawri Bazar Metro Station — two approached through nearby bylanes, while the third arrived in a TSR (three-wheeled scooter rickshaw) after deboarding a Metro train at Rajiv Chowk. Metro data later confirmed that this person had boarded the train from Noida City Centre.”Story continues below this adA team led by Sub-Inspector Prashant found the TSR driver. “The driver confirmed that he had picked up the individual from Connaught Place. The team found that the accused took another train back to Noida City Centre Metro station. He got off and drove away on a scooter,” the DCP said.The scooter was registered in the name of a junior engineer with the New Delhi Municipal Council, who lives in Noida. The engineer told the police that her scooter was being used by her driver, Aloknath Mishra. A trap was laid, and Mishra was arrested on Tuesday.“Mishra admitted that the robbery had been orchestrated by Kaif as an act of revenge. Kaif hired Mishra, Sohail, and Waseem to execute the plan. Kaif was then arrested from his residence near Jama Masjid and Sohail was arrested from Mustafabad. They admitted that the proceeds of the robbery were with Waseem,” DCP Banthia said.Investigation showed that Waseem fled to Moradabad after the robbery and then went to Sambhal. He then booked a hotel in Roorkee, where he stayed for five days.Story continues below this ad“Waseem kept his phone switched off most of the time, switching it on only for a few minutes daily — and always from a location away from his actual place of stay to mislead police. He hid the robbed jewels in Roorkee and was last tracked to Mussoorie,” Banthia said.A trap was laid at Library Chowk in Mussoorie, and the accused was arrested on July 27. Police have recovered the majority of the robbed amount.A police officer said Kaif started doing business with Sen in 2023, and has known him for 20 years. “Kaif felt that Sen was visiting foreign countries and taking over his clients for his own business. This caused a monetary dispute between the two and led to a fallout,” the officer said.