Cartel lawyers zoom in on government witness

They claim their clients are entitled to understand precisely what the government did to mitigate such risks for its witness

Disclosure key in place of the enter key on a keyboard
Recent US disclosure prompts defence to dig deeper into overseas dealings concerning a co-operating witness

The attorneys for three UK nationals accused of currency market manipulation have asked a New York court to help them obtain documents from the US Department of Justice (DoJ) that reveal how the agency allegedly helped a key witness in its case avoid prosecution overseas.

Counsels for Christopher Ashton, formerly of Barclays, Rohan Ramchandani, previously of Citi, and Richard Usher, most recently of JP Morgan and RBS, say they received a significant Brady disclosure from the government at the

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