A prominent white-collar defender at Arnold & Porter is expected to testify in support of Gregory Craig, the former Skadden, Arps, Slate, Meagher & Flom partner in Washington who is charged with making false statements about the scope of his work for Ukraine, according to new court filings.

Craig’s defense lawyers said late Monday they plan to call Arnold & Porter’s Amy Jeffress, a longtime former federal prosecutor, as a trial witness to support their client. Craig was accused in April of concealing information about his work on a report prepared in 2012 for the Russia-aligned government of Ukraine about the prosecution of former prime minister Yulia Tymoshenko.