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UNKNOWN - APRIL 19: In this image released by the Federal Bureau of Investigation (FBI) on April 19, 2013, Dzhokhar Tsarnaev, 19-years-old, a suspect in the Boston Marathon bombing is seen. After a car chase and shoot out with police one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Photo provided by FBI via Getty Images)
UNKNOWN - APRIL 19: In this image released by the Federal Bureau of Investigation (FBI) on April 19, 2013, Dzhokhar Tsarnaev, 19-years-old, a suspect in the Boston Marathon bombing is seen. After a car chase and shoot out with police one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, 26, was shot and killed by police early morning April 19, and a manhunt is underway for his brother and second suspect, 19-year-old suspect Dzhokhar A. Tsarnaev. The two are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. (Photo provided by FBI via Getty Images)

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Tsarnaev lawyer facing 'Everest' of death penalty cases

CNN Legal Analyst Paul Callan says Dzhokhar Tsarnaev's attorney Judy Clarke faces an uphill battle as she prepares to fight for the convicted Boston bomber's life.

Tsarnaev lawyer facing 'Everest' of death penalty cases

CNN Legal Analyst Paul Callan says Dzhokhar Tsarnaev's attorney Judy Clarke faces an uphill battle as she prepares to fight for the convicted Boston bomber's life.