kolkata the probe into the murder of 48yearold doctor chandreyi das chowdhury was expanded on monday to include banking transactions made by the victim after it became apparent that the doctor was involved in a tiff with at least two extended family members over financial issueshowever with the passage of more than 50 days since the death cops say several evidence trails have almost come to a dead end the thrust thus is on finding as much circumstantial evidence as possible even as some suspects have been put through multiple rounds of questioning in the past 48 hours a joint team from rabindra sarobar and homicide section is carrying out the questioningcertain accounts to which das chowdhury had access along with other family members are being probed confirmed an officerthe cops are also not ruling out the chance that an an attempt had been made to sell off the flat off southern avenue in the lake area sources said that a couple of places that her brother joy and mother kalyani had visited including digha after her death are also under probe we have asked some relatives close to her mother to join the probe confirmed a police sourcethe cops on monday revealed details of das chowdhurys postmortem report which suggest that her end was brutal she was hit on the head from behind and strangulated with force she had haematoma bloodclotting in her head a broken bone in her neck and internal bruises on her neck and hands death was due to the effects of manual strangulation the report saidthe findings of the postmortem do not match some of the statements given by her family memberspolice said joy did not have a steady source of income he is an avid blogger and a stamp collector the family survived on the pension earned by their mother collecting stamps can be a costly affair hence joys accounts too will be checked on tuesday explained an officerthe cctv cameras near keyatala may not have old recordings but we will try to fix all those who entered the house on may 21 and 22 that would mean collecting statements from at least 15 members of the extended family said police