The Serious Fraud Office itself concluded as much.”<br />A lawyer for Mr. Ashton, David Schertler, said: “We do not believe that Mr. Ashton violated any laws here in the U. S. or in the U. K.<br />He is willing to voluntarily return to the U. S. and answer and defend the charges in the U. S. courts.”<br />The criminal case against the three men is one of three cases<br />that the United States Justice Department has brought against individuals in its investigation.<br />According to a letter filed in their court case on Monday, the three defendants — Christopher Ashton, a former Barclays trader; Rohan Ramchandani, the former head of G-10 FX spot trading at Citigroup;<br />and Richard Usher, a former JPMorgan Chase trader — have all agreed to waive extradition and appear next month in the Federal District Court in Manhattan.<br />Ex-Traders in Britain to Face Currency-Rigging Charges in U. S. -<br />By CHAD BRAYJUNE 13, 2017<br />LONDON — Three former traders in Britain have agreed to travel to the United States to face criminal charges<br />that they were part of a conspiracy to rig foreign currency markets.<br />In the last three years, some of the world’s biggest banks, including Barclays, Citigroup, JPMorgan Chase<br />and the Royal Bank of Scotland, have agreed to pay billions in civil penalties in the inquiries and some banks have pleaded guilty to criminal charges in the United States.