A case was filed against eight people, including former superintendent of police Babul Akter, in connection with the death of his wife Mahmuda Khanam Mitu, who was killed in broad daylight in 2016.   Mitu’s father Mosharraf Hossain filed the case with Panchlaish Police Station on Wednesday noon, said officer-in-charge of the police station Abul Kashem Bhuiyan.   While talking to the reporters, Mosharraf, said: “I said earlier that Babul has an involvement in my daughter’s murder and now I came here to file a case against him.”   Read:Mitu murder case: Former Chattogram SP Babul Akter detained Earlier, the Police Bureau of Investigation (PBI) detained Chattogram's former police superintendent Babul Akter following an investigation that made it clear that he an involvement in his wife's murder. Santosh Kumar Chakma, the investigating officer of the case, said Babul himself came to the PBI office in Mansurabad on Tuesday afternoon to check the progress of the murder case.   On June 5, 2016, unidentified assailants gunned down Babul's wife Mitu at the port city's GEC intersection while she was going to drop her son Mahir Akhter, 7, for a bus of Chittagong Cantonment Public School and College. Soon after the crime, Babul had filed a murder case with Panchlaish Police Station against three unidentified men.   Later, police arrested four people, including Abu Nasur Gunu, Shah Zaman alias Robin, Md Anwar and Md Motaleb Mia alias Wasim, from different places in connection with the murder.   Of them, Anwar and Wasim made confessional statements before a magistrate, implicating seven people, including Musa who directly took part in the killing, Mohammad Rashed and Nabi.   During the course of the probe, police had also arrested "arms supplier" Ehteshamul Haque Bhola and his assistant Md Monir and seized a pistol from their possession.   Police had also arrested Musa's elder brother Saidul Shikder Shakur and Shahjahan for providing the motorbike that was used in the murder. But on July 4, 2016, Nabi and Rashed were killed in a gunfight with police in Rangunia.   Read:Ex-SP Babul Akter finally held over 2016 murder of wife Mitu The case was transferred to the PBI in 2019, after Mitu's father, himself a retired police officer, filed a complaint against the CMP's mishandling of the case.   Mitu's father had, in fact, accused Babul of being directly involved in the murder case. "He (Babul) should be implicated in the murder case... if he's not, we'll go to the court." Babul had called for questioning a number of times by the PBI since his transfer, but he was detained.