Flash crash trader used rapid series of brokers: documents

By Sarah N. Lynch and Tom Polansek WASHINGTON/CHICAGO (Reuters) - The UK futures trader blamed for his role in the May 2010 Wall Street flash crash went through a rapid succession of brokerages that cleared his trades on the CME, documents filed in court showed. Navinder Singh Sarao, who was arrested in the UK this week on U.S. charges he manipulated futures markets, did business with now defunct MF Global, Marex, Knight Futures and finally R.J. O'Brien, the documents showed.