Dhaka Metropolitan Magistrate Sorafuzzaman Ansari recorded the confessional statement of Sadat, a student of Mechanical Engineering department of Bangladesh University of Engineering and Technology (Buet).
He made the confession when he was produced before the court on completion of his five-day remand.
Sadat was placed on the remand on October 16, a day after he was arrested from Katlabazar in Birampur upazila of Dinajpur district while trying to flee the country.
Abrar Fahad, 21, a second-year student of electrical and electronic engineering of Buet, was beaten to death reportedly by Bangladesh Chhatra League leaders at Sher-e-Bangla Hall of the university.
He was found dead on the staircase of the hall in the early hours of October 7 after he was taken to the room No-2011 around 8pm on October 6 and beaten mercilessly.