hyderabad it has been 11 months since jayanti bai sahu 70 and her granddaughter ankita sahu 14were brutally murdered at their residence in langar houz but police is yet to solve the case in spite of claiming that they have vital cluesthe double murder took place in the early hours of sept 3 2002 and the killers took away rs 20 lakh worth of jewellery and cashall clues pointed to the involvement of insiders several suspects were picked up and questioned but police sources said some of those close to the family were not thoroughly grilledpolice initially said the killers scaled the compound wall and entered the residence through an open door adjacent to the room where the victims were sleepingalso the two alsatian dogs that were the sahu family pets did not even whimper when the intrusion took placebut at a later stage of the probe investigators found two vital clues after making informal enquiries with the inmatesone of the clue pointed to the fact that the grill door through which the killers entered the house normally used to be always locked but on the fateful day the door was not locked and the lock with its key inserted in it was found hanging to the latch a source in the police saidthe second clue which police got was that the key bunch containing all the keys of the house used to be in the custody of jayanti bai she used to keep it under her pillow at night which only the members of her family knew but strangely after the murders the key bunch was found safely hooked on the wall near the grill door the source saidonly people very close to the family could have unlocked the door to enable the killers enter the house and leave the key bunch on the hook the source saidit may also be recalled that police officials had told reporters earlier that the affluent sahu family had several properties which are under litigation some of these properties were in jayantis namethe investigators believe that some more persons very close to the family need to be taken into custody and questioned to solve the sensational double murder case the source said