Boston Bombing Probe at 'Critical Point': Borelli

April 18 (Bloomberg) -- Don Borelli, chief operating officer at The Soufran Group, talks with Bloomberg's Tom Keene about how complicated it is to investigate a case as big Monday's Boston Marathon bombing. He speaks on Bloomberg Television's "Bloomberg Surveillance."
What You Need to Know: Stock Sell-off, Oil, Fed Rates
09:55 - Bloomberg's Jonathan Ferro briefs you on the top stories of the day.
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