Jahangir was sent to jail Thursday after Senior Judicial Magistrate Sultan Sohag Uddin recorded his statement.
Owner of Al-Amin Cyber Point and Studio located in Haripur area of the upazila, Jahangir was arrested from Naukaghat area in the town on November 29.
Local sources say Jahangir is a close associate of Haripur Union Parishad Chairman Dewan Atiqur Rahman Ankhi. He was arrested on August 28.
Additional Police Superintendent Mohammad Iqbal said that Jahangir had been produced before the court, on completion of his third remand, where he gave statement under section 164.
Court police Inspector Md Mahabubur Rahman confirmed the confession, but refused to disclose details.
Police suspect that the controversial morphed image, which sparked the October 30 attacks, was uploaded from the cyber café using the Facebook ID of local fisherman Rasraj Das, who is an illiterate person.
At least 17 temples and Puja pavilions, and over 58 houses were vandalised and looted by a mob of radical Islamists on that day. Later more houses were vandalised and torched.
A desktop computer that was owned by Jahangir and was being used in a different business outlet after the incident was also seized as evidence. The computer will be sent to CID for forensic analysis.
Two truckers, who gave confessional statements to the court, said Jahangir was among the people who had rented their vehicles to bring in the attackers.