The Detective Branch of police on Saturday claimed to have found “partial” involvement of the only daughter of the slain Special Branch inspector and his wife in the brutal murder.
The detectives said they had come to this decision after interrogating the two security guards and the manager of the building where the SB inspector’s family lived, three friends of Oishee, her younger brother and uncles, and the driver of the CNG-run auto-rickshaw Oishee had hired for a whole day on Thursday.
Oishee’s father Mahfuzur Rahman, 48, and his wife Swapna Rahman, 40, were found dead at their Chamelibagh flat on Friday afternoon. Oishee, an O level student and the domestic help had been missing since the incident.
Police suspected the killing took place early Thursday.
They said the couple who had been stabbed to death might have been sedated on Wednesday night.
Oishee, 16, surrendered to Paltan police around 2:30pm on Saturday and then was taken to the DB office on Minto Road.
The DB detained domestic help Sumi Begum, 10, and a male friend of Oishee. They also picked up three friends of her for interrogation.
Briefing journalists at the Dhaka Metropolitan Police media centre last night, DB Joint Commissioner Monirul Islam said after Oishee surrendered, she was taken to the office of the deputy commissioner of Motijheel division and then to the DB office.
He said the girl had told them different stories at different times, so they could not depend on her.
The DB picked up several people upon her information by raiding different areas in the capital between 4pm and 6pm.
Oishee got out of their flat with her eight-year-old brother Ohidur Rahman and domestic help Sumi and left the house by a three-wheeler on Thursday morning. The dead bodies were found in Oishee’s bathroom on Friday afternoon and they bore several stab wounds.
Constable Emdadul Haque of the Paltan police station said Oishee had appeared in front of the police station’s gate around 2pm.
“She came alone and said she had something to tell. She asked me who she should contact,” he said.
When the policeman inquired about her identity, she said she was Oishee and she was coming from Badda.
“I heard about the killing. So, I recognised her and took her to the duty officer. Later, high officials of Motijheel division were informed,” he said.
Operation officer of the police station Nasir Uddin said Oishee had looked tired and they had not asked her anything. After around 10 minutes she was sent to the DB office.
“We are almost sure that she [Oishee] was partially involved with the murder. But it is not yet clear how many people were with her. We think we will come to know this after interrogating the detainees,” DB Joint Commissioner Monirul Islam said.
The DB recovered two bags and some ornaments of Swapna from the two bags Oishee had been carrying.
“We have come to know that she hired a CNG-run auto-rickshaw for the whole day, saying they needed to search for a flat to rent. Later, Oishee managed the auto-rickshaw driver to keep the domestic help at his house for Friday night for some extra money,” Monir said.
Police also interrogated security guards of the house Mohammad Motaleb and Mohammad Shaheen, Oishee’s uncles Iftekharul Alam and Rabiul Alam, manager of the Chamelibagh building Jahangir Alam and the auto-rickshaw driver.
Meanwhile, a post mortem examination report showed that SB Inspector Mahfuzur Rahman and his wife Swapna Rahman were murdered by non-professional killers.
Sohel Mahmud, assistant professor of the Forensic Department of Dhaka Medical College Hospital who had conducted the autopsy, said the report had showed that several people were involved in the killing and it was a planned murder.
The report also showed that two injury marks were found on Mahfuz’s body while 11 on his wife Swapna’s body.
“The knife used in the murder damaged the livers and kidneys of Mahfuz and Swapna. They died as their respiratory tracts were severed because of multiple stabbing,” said Sohel. Law enforcers had collected samples of different parts of the victims’ bodies for forensic test.
The bodies were taken to Mahfuz’s village home in Haluaghat of Mymensingh for burial after namaj-e-janaza in front of the Rajarbagh Police Lines.
Mahfuz’s brother Moshiur Rahman filed a murder case with Paltan police station Saturday, accusing unmanned people.
