A case was lodged with Kadamtali police station in the capital early Sunday in connection with the killing of a couple and their daughter, police said.  Police recovered the bodies of Masud Rana, 50, his wife Moushumi Islam and their daughter Jannatul from the flat located on the 1st floor of a multistoried building at 274/1 Lal Mia Sarder Road of Muradpur under Kadamtoli police station on Saturday. Shakhwat Hossain, a brother of the victim Masud Rana filed the case accusing Masud Rana’s daughter Mehjabin and her husband Shafiqul Islam. Also read: 3 of a family found dead in Dhaka A murder case has been filed accusing daughter Mehejabin and her husband Shafiqul Islam Aranya for allegedly killing her parents and sister, said Officer-in-charge of Kadamtoli police station Jamal Uddin. The case was filed by Masud Rana's elder brother Shakhawat Hossain. Police have already arrested Mehjabin soon after the incident, while her husband Shafiqul Islam Aranya is being treated in police custody at Mitford Hospital in the capital, the OC said. Police suspected that Mehzabin killed her father Masud Rana, mother Mausumi and sister Jannatul on Friday night over a family feud. Also read: Case filed over Sylhet triple murder The victims had scars on their necks. Police believe they were strangled to death after being first given sleeping pills or drugs. Police said Mehzabin called the National Emergency Service 999 after the killings on Friday night and informed the police that she had killed her parents and her sister. She also informed the police that her husband and daughter were sleeping in bed. "I can kill them too. I can kill myself. You come early. Catch me," she said.