[5] He earned his bachelor's and master's degrees from the University of Dhaka in 1960 and 1961 in the Economics Department respectively.
[5] He served as the Inspector General of Bangladesh Police from 22 April 1996 until 16 November 1997.
[5] In July 1997, in the wake of the film actor Salman Shah's death, Haq, as the then IGP, referred the case to the Criminal Investigation Department (CID) for further investigation.
He then worked as management and financial consultant of Rupali Insurance Company till mid 2020.
[5][8] Haq passed away from a heart attack in the Uttara neighborhood of Dhaka on 15 January 2025, at the age of 84.