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US comedian Bill Cosby leaves December 30, 2015 the Court House in Elkins Park, Pennsylvania after arraignment on charges of aggravated indecent assault. Cosby was arraigned over an incident that took place in 2004 -- the first criminal charge filed against the actor after dozens of women claimed abuse.AFP PHOTO/KENA BETANCUR / AFP / KENA BETANCUR        (Photo credit should read KENA BETANCUR/AFP/Getty Images)
US comedian Bill Cosby leaves December 30, 2015 the Court House in Elkins Park, Pennsylvania after arraignment on charges of aggravated indecent assault. Cosby was arraigned over an incident that took place in 2004 -- the first criminal charge filed against the actor after dozens of women claimed abuse.AFP PHOTO/KENA BETANCUR / AFP / KENA BETANCUR        (Photo credit should read KENA BETANCUR/AFP/Getty Images)

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    Email may derail case against Bill Cosby

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Email may derail case against Bill Cosby

The charges filed against Bill Cosby by a Pennsylvania district attorney could fall apart because of new evidence. CNN's Michael Smerconish reports.

Email may derail case against Bill Cosby

The charges filed against Bill Cosby by a Pennsylvania district attorney could fall apart because of new evidence. CNN's Michael Smerconish reports.