On the surface, Muhammed Asif Hafeez was an upstanding individual.
A global businessman and ambassador of a prestigious London polo club, he rubbed shoulders with the British elite, including members of the Royal Family.
He also regularly passed on detailed information to the authorities in the UK and Middle East that, in some cases, led to the interception of huge shipments of drugs. He was motivated, he said, simply by what he saw as his "moral obligation to curb and highlight criminal activities".
At least, that is what he would have had people think.
In reality, Hafeez was himself what US officials described as "one of the world's most prolific drug traffickers".
