The five-week trial looked set to end on Thursday, until the jury sent a note saying that one of them refused to recognize the proper definition of reasonable doubt.
In general, juries that have repeatedly reported an impasse are unlikely to reach consensus. But sometimes, those asked by a judge to try harder do return a verdict.
A Fourth Circuit panel ordered the case to be dismissed, citing a new Supreme Court ruling limiting the ability of foreign citizens to sue in U.S. court.