Siful Haque Sujan, 31, was killed by a US strike on December 10 last year. Believed to have paid for a 15-year-old British girl to travel to join ISIS.
Siful Haque Sujan, 31, is also believed to have paid for a 15-year-old British girl to travel to the IS-controlled region of the Middle East to become a terrorist bride, The Mail on Sunday can reveal.
Sujan – who led the terror group's cyber operations after going to Syria – was killed by a US strike on December 10 last year, one of ten ISIS leaders killed last month, according to the Pentagon.
Born in Bangladesh, Sujan came to Britain as a student in 2003, settling in Cardiff and bringing his wife Shayma Akter, 28, in 200.
He enrolled on a computing course at South Wales University and the couple set up an IT firm called Ibacs in 2006.
Counter-terrorism officers in Wales and Manchester are jointly investigating his financial activities.
Police in Bangladesh suspect Sujan and his family funnelled hundreds of thousands of pounds from the UK to ISIS leaders in the capital Dhaka so it could be sent to Syria.
Detectives arrested one of Sujan's business associates, 24-year-old Abdul Samad, in a dawn raid at his house in Newport, South Wales, on the same day the hacker was killed in Syria.
Samad was a director of Ibacs, which has been renamed Ibacstel.
He was questioned in Manchester about money Ibacstel sent to its branch in Dhaka.
He was also asked about £500 that Ibacstel allegedly transferred to the bank account of a 15-year-old girl, who detectives believe wanted the money to pay for flights to Turkey then a coach to the Syrian border.
Samad has been bailed until March. Last month Bangladeshi police in Dhaka arrested Sujan's father Abul Hasanat, 70, and his brother, Ahsanul Haque Galib, 15.
Hasanat is accused of receiving £333,000 from Ibactsel, which police believe was about to be handed over to a local ISIS leader, who would have sent it to Syria. The pair were yesterday still in custody.
Court documents reveal Sujan and Akter lost their bid to renew their visas in April 2014, and left the UK in July, telling friends they were moving back to Bangladesh. But within a month of arriving in Dhaka, the couple and their two young sons left, telling family they were returning to the UK.
Detectives believe they flew to Turkey before crossing into Syria.
Sujan became leader of the terror group's cyber operations after another Briton, Junaid Hussain, 21, died in a drone strike in August.
Sujan's family say Akter has remained in Raqqa, since his death.
Asked about Samad's arrest, Greater Manchester Police said: 'This is part of a wider counter-terrorism investigation and we are not willing to comment any further,' Daily mail reported.
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