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KOLKATA: Sambia Sohrab , the 24-year-old son of Trinamool leader Md Sohrab, was arrested from a central Kolkata hideout late on Saturday as the prime accused in the hit-and-run death of an IAF corporal during R-Day rehearsals on Red Road last Wednesday.The arrest came close to midnight, hours after Kolkata Police finally named Sambia as the one at the wheel of the rampaging Audi and Trinamool distanced itself from Sohrab and his son.Police were tracking a mobile phone being used by Sambia and zeroed in on him soon after he took a call late on Saturday night, say sources. He was picked up from Beckbagan near his in-laws' house, say sources. He faces charges of murder and criminal conspiracy.Earlier in the day, the Special Investigation Team had named Sambia as the prime suspect. “We have more or less identified him (Sambia) as the man behind the wheel,“ said joint CP-crime Debashish Boral. Sambia, who married on January 5, is a businessman and spends most of his time in China. Police raided 10 locations in Kolkata, including the houses of a couple of his acquaintances and friends, over the past two days but found no trace of him.Trinamool was quick to distance itself from Md Sohrab. Calling the accident “horrific” and the driver a “reckless demon”, a Trinamool press statement issued in the evening said: “The owner of the car, reported to be driving it at the time, has no connection with Trinamool Congress. His father is a minor political activist, elected to the state assembly with the support of the Left Front in 2006. Neither the alleged driver of the car nor his father have ever attended formal, committee or organisational meetings of Trinamool. We have nothing to do with them and have never had anything to do with them. The culprits must be booked.“Police say they have clinching evidence against Sambia. The first is the statement of a constable from south traffic guard, who identified Sambia at the wheel that morning. “It was with this constable that Sambia had an argument at Kidderpore Road crossing,“ said a source, adding that two other “uniformed men“ have identified Sambia. Officers wouldn't say if the other two are military personnel. This tallies with what Sk Sanu, Sambia's friend and grandson of Bowbazar blast convict Rashid Khan, has told police, say sources. Police don’t believe Sanu’s claim that he was in his friend Johnnie’s Skoda, and not Sambia’s Audi, during the accident. “Johnnie or his family don’t own a car,” said a source. Lalbazar officers refused to say how many people were in the Audi.“Let us record the statements of a few other Army personnel,” said an investigator. Second, Sambia’s mobile phone has been tracked in the vicinity of the accident site. Tower locations and CCTV footage indicate Sambia’s elder brother Ambia was at home on Wednesday night and left only after 7am on Thursday.In contrast, Sambia’s tower locations show he was at various night clubs after initially going near his inlaws residence at Karaya.Forensic scientists will compare DNA from blood samples taken from the Audi with Sambia, say police.Third, police say they have received a tip that the Audi driver was wearing a blue coloured jacket that morning. “From the evidence we have collected so far, we know that Sambia was carrying a blue jacket with him,“ said a source.Finally, police are de pending on information provided by Sambia’s aides and also the relatives of the two friends — Sanu and Johnnie — missing along with him. Detectives arrested Sachin Shah alias Sachin Sahu, a manager of the Sohrabs, on pending cases after calling him for questioning on the Sohrabs’ movements.“This is the method we adopted to arrest Sambhunath Kow and Gopal Tewary,” said an officer, explaining that they were trying to identify and cut off everyone helping the absconders. Everyone who called the Sohrabs or received a call from them is being called to Lalbazar, said an officer. From the kin of Sanu and Johnnie, police have a good idea of who Sambia hung around with. “We are seriously investigating a theory that they were racing cars around Port and Kona Expressway,” an officer said.