A day after Vijender Singh refused to provide blood and hair samples for forensic examination,top sources in the Punjab Police said investigators would go to court to get the boxer to cooperate. During nearly three hours of interrogation on Monday evening,Vijender had stonewalled most questions about his involvement in last weeks mega drug bust at alleged narcotics smuggler Anoop Singh Kahlons home in Zirakpur in Mohali. The sources said police were likely to move court sooner than later because evidence of drug use stays in hair for only a few months,and delay in testing might produce flawed results. They said Punjab Police would not accept the result of a test on any sample collected from the boxer by any other agency,including the National Anti-Doping Agency or the Haryana Police,his employer. SSP Fatehgarh Sahib,Hardayal Singh Mann,however,said police were not focusing all their attention on the boxer: We are keener on nabbing the others involved in this international drug chain. Police sources said it was unlikely that Vijender would be questioned again soon. The Fatehgarh Sahib police continued to question Vijenders sparring partner Ram Singh. Sources said he had alleged that Vijender had insisted on meeting Kahlon on several occasions in the past month. One meeting,at which Ram claimed he was present,allegedly took place at midnight at Kahlons Zirakpur home. Police sources said Rams claim was corroborated by Vijenders call records. On Monday,alleged narcotics courier Paramjit Singh suspected to have been working for both Kahlon and Canadian citizen Manpreet Singh Gill alias Mani who was arrested in Mandi Gobindgarh on Friday was brought from Delhis Tihar jail to Fatehgarh Sahib on a production warrant. Police sources said a list of suspects had been shared with the police in Brampton,a suburb of Toronto,and the Canadians too had begun investigations to track the drug chain. Gill and his accomplice Gabbar Singh who too has been arrested allegedly smuggled ingredients of party drugs to Canada through the US. SSP Mann said police were looking for Jagdish Bhola,a dismissed Punjab policeman who is alleged to be the kingpin of the drug ring. Meanwhile,national boxing coach G S Sandhu said Vijender had asked for a break from a camp at NIS Patiala till March 17. We have granted him permission, HE said. Vijender couldnt be reached for comment. His father Mahipal Beniwal said,We talked with him last evening. He has assured us he will fully cooperate with the investigation.