Two days after the murder of Namdhari matriarch Chand Kaur (88), Punjab Director-General of Police (DGP) Suresh Arora visited the crime site in Bhaini Sahib today and reviewed the progress in the case. He questioned golf cart driver Kartar Singh about the sequence of events till the murder. Arora also met Satguru Uday Singh and other family members.Smelling a plot, the Ludhiana police had in the past three months repeatedly questioned more than 500 Namdharis at the office of the Commissioner of police, some of them in connection with the murder of Namdhari leader Avtar Singh Tari. “Each time we would summon them for questioning, they (Namdharis) would go on a fast and shun water for the whole day,” said an official. Sources said the attack on Mata Chand Kaur was well-planned. The killers were aware that Laddi, her personal sevadar, would not be with her that day.Lakhvir Singh, spokesperson for the Namdhari Darbar, said: “First Avtar Singh Tari was killed in April 2011. Then in August, 2013, Satguru Uday Singh was attacked at a gurdwara in England. But we never suspected Mata ji too could be on the hit list.”Sources said Ajay Sharma alias Bittu (36), an alleged suicide bomber, was killed in an explosion in Jalandhar in December last. This made the police sit up. Jagmohan Singh and Hardeep Singh, who were followers of  Thakur Dalip Singh were, arrested for “hatching a conspiracy,” but Delhi’s Palwinder Singh and Sirsa’s Ratan Singh fled the country. Meanwhile, Universal Human Rights Commission president Satnam Singh Dhaliwal has demanded a CBI probe in the case.  He pointed out that three SITs were formed after the killing of Namdhari leader Tari in 2011.  But there had been no headway in the matter. Dhaliwal feared that because of political intervention, Mata Chand Kaur’s murder case too would be “buried in police files”.