US prosecutors credit gold trader in Iran sanctions case with key help ahead of sentencing

U.S. prosecutors credit Turkish-Iranian gold trader Reza Zarrab for providing key testimony in a 2017 trial against a Turkish banker, which strained U.S.-Turkey relations. Zarrab admitted to helping Iran evade sanctions and faced threats and asset freezes from Turkey after cooperating with U.S. authorities. The U.S. government recently dismissed a case against Turkey's Halkbank amid improved ties between President Recep Tayyip Erdogan and Donald Trump.