Mohammad Hasan is two people, one of whom has a very important family name. His first identity is that of a small-time businessman from Bangladesh who journeyed thousands of miles to build a new life in Europe.

The money exchange, called Bay of Bengal, is one of several ventures Hasan has run in Budapest since arriving in May 2015. The exchange is illegal with no license to operate, but that does not matter to Hasan.

That's because his second identity, his real identity, is Haris Ahmed. He is the third of five brothers, four of whom are part of a criminal gang that has the protection of the Prime Minister of Bangladesh.

The fifth brother is General Aziz Ahmed, the most powerful military leader in his home country. Together, the Ahmed brothers have built an empire.