Defence counsels had filed an appeal with the Supreme Court against the verdict but it was declared invalid on Tuesday.
Alim was born on Nov 1, 1930 in Joypurhat. His father Abdul Wahed owned Islamia Rice Mill on Thana Road. His family migrated to Joypurhat from Hooghly in West Bengal in 1950-51.
He did his post-graduation in law to pursue a lawyer's career. In 1958, he joined the Muslim League and rose through the ranks in four years to become the party's organising secretary.
He was the vice-chairman of the Bogra district council and an influential leader of the Convention Muslim League during the final stages of the War of Independence.
Alim was the chairman of the Joypurhat ‘Shanti (Peace) Committee’ formed to assist the Pakistani army. He was directly involved in raising the Razakar Bahini there and in crimes against humanity during the war.
He was accused under the Collaborators Act brought by Bangabandhu Sheikh Mujibur Rahman after Bangladesh’s liberation from Pakistan.
He was elected chairman of the Joypurhat Municipality in 1975 and 1977, and had won the parliamentary election in 1979, 1996 and 2001 on BNP ticket.