Two years after the murder of former SP Babul Akter's wife Mahmuda Khanam Mitu, police are going to wrap up the investigation and file the charge sheet.

The government has not placed Superintendent of Police Babul Akter, whose wife was killed last month in Chittagong, under scanner, Home Minister Asaduzzaman Khan has said in relevance to quizzing of the police official.

Seven to eight criminals took part in the murder of SP Babul Akter's wife Mahmuda Khanam Mitu in exchange for money they received through a middleman, police said yesterday.