A police complaint has been filed against 44 students of Khulna University of Science and Technology (KUET) over the unusual death of professor Mohammad Selim Hossain.Professor Selim's father Md Shukur Ali Molla filed the complaint at the Khan Jahan Ali Police Station on Wednesday, said officer-in-charge (OC) Probir Kumar Biswas.Legal action will be taken after the investigation, he added.However, Prof Selim's father has complained that no case has been registered in this connection."We went to Khulna on Wednesday morning and filed a complaint under Section 302/34 of the Penal Code against 44 students in connection with the death. However, the OC said that action would be taken after the investigation without filing it as a statement,” said  the father.When contacted, Shukur Ali expressed doubt over not getting fair judgment.Earlier on January 5, the student disciplinary committee of the university expelled four students, including university unit general secretary of Bangladesh Chhatra League(BCL) Sadman Nahyan Sejan for life term.Besides, 40 more students were punished in different terms. All these students are leaders and activists of Chhatra League.Prof Selim, 38, a teacher of the Electrical and Electronics Engineering (EEE) department at the university and also the provost of Lalan Shah Hall, died on November 30. According to faculty members of the university, Prof Selim died hours after some Chhatra League activists, led by Sadman allegedly confined the teacher to his office and mentally tortured him to accept their choice as dining manager of Lalan Shah Hall for the month of December.During this confinement, the teacher was allegedly subjected to abuses, humiliation and threat, his colleagues said. On December 3, the university was declared closed till December 13. Its closure was extended twice till January 7.