Police now look for instigators

Detectives have been investigating whether anyone instigated the murder of Special Branch inspector Mahfuzur Rahman and his wife Swapna Rahman or helped their daughter Oishee Rahman kill them at their Chamelibagh residence in the capital.
"We found that Oishee not only planned the murder but also directly took part in it. However, we are not yet certain about the exact number of murderers or the murder motive," Joint Commissioner of Police Monirul Islam told reporters at the Dhaka Metropolitan Police media centre yesterday.
Police recovered the decomposing bodies of the couple from their apartment around 4:00pm on Friday. Their 17-year-old daughter the following day surrendered to the police and later admitted to committing the murders in the early hours of Thursday.
With information from Oishee, police arrested Khadiza Khatun Sumi, a minor house help, who had helped Oishee move the dead bodies to a bathroom in the house, and Oishee's friend Mizanur Rahman Rony, who helped Oishee stay at one of his aunt's place Friday night.
On Sunday, the trio were taken on remand for five days to find out if anyone else had planned the murder or had direct or indirect involvement in the killing.
The two security guards and the caretaker of the Chamelibagh apartment building had told reporters that no one other than Mahfuzur's family members entered the apartment since Wednesday night. They also confirmed that guards had always been at the gate from Wednesday to Friday.
Monirul quoted Oishee to have told police that she had had her parents drink coffee mixed with 10 sleeping pills before she stabbed them to death.
The mystery still remains as to how Oishee got those sedatives and the knife she used to stab her parents.
Police are also trying to find out the two persons, who according to Oishee, assured her of a safe escape to India.
Police, however, did not disclose their names.
Quoting Sumi, the house help, a detective official told The Daily Star that Oishee about a month ago ran away from home and her father brought her back home at that time.