Attorney Preet Bharara describes charges against Costa Rica-based Liberty Reserve
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Liberty Reserve crime 'simple and brazen'

Barclays has confirmed it is working with US authorities into the investigation into Liberty Reserve.

The online money transfer service was shut down last week by the authorities in the United States and Costa Rica - they say criminals have used it to launder £4bn around the world.

Gary Miller, Head of Fraud at Solicitors Mishcon de Reya and member of the International Fraud Group, told the Today programme: "In simple terms it was a criminal version of PayPal.

"It was quite simple and quite brazen."

First broadcast on the Today programme on Monday 3 June 2013.