Dzhokhar Tsarnaev's Family Background

Dzhokhar Tsarnaev is pictured in this handout photo presented as evidence by the U.S. Attorney's Office in Boston, Massachusetts, on March 23, 2015

A photo, showing Tamerlan Tsarnaev as an infant (center), with his father Anzor (left), mother Zubeidat, and uncle Muhammad Suleimanov (right) in Makhachkala, Daghestan. 

Dzhokhar and Tamerlan Tsarnaev's aunt Patimat Suleimanova looks at photos from a family album in her house in Makhachkala.

A family photo of Tamerlan (center top) and Dzhokhar (center bottom) Tsarnaev with their sisters in their old Kyrgyzstan home, where the family lived for generations. 

Dzhokhar Tsarnaev (right) with his friends Azamat Tazhayakov (left) and Dias Kadyrbaev in an undated photo taken in New York.

Tamerlan Tsarnaev waits for a decision after a boxing match in Salt Lake City, Utah, in 2009.

A photo of Dzhokhar Tsarnaev taken at his home in Cambridge, Massachusetts, that was used as evidence in his trial. 

A video grab shows Dzhokhar Tsarnaev (right) and his brother Tamerlan leaving a New Hampshire firing range in March 2013, less than a month before the Boston Marathon bombings.

A video grab used as prosecution evidence shows Tamerlan Tsarnaev (right) and Dzhokhar Tsarnaev (left) entering a Shell station in Cambridge, Massachusetts, on April 15, 2013, the day of the bombing attacks.

A still image of Dzhokhar Tsarnaev from a surveillance video, which was also entered as prosecution evidence. 

Dzhokhar Tsarnaev is shown before his arrest with a sniper's laser sight trained on his head as he surrenders to authorities on April 19, 2013, after a massive manhunt in the wake of the Boston bombings. 

A handwritten bloodstained note found inside the boat with bullet holes where Dzhokhar Tsarnaev was found hiding in Watertown, Massachusetts. 

Tamerlan (right) and Dzokhar Tsarnaev are seen in a photo released by the FBI, dating from when they were being sought for questioning for the Boston Marathon bombings in April 2013. 

Journalists chase Zubeidat Tsarnaeva (right front), the mother of Dzhokhar and Tamerlan Tsarnaev, in Makhachkala, Daghestan, in April 2013. 

Ailina Tsarnaeva, the sister of Dzhokhar and Tamerlan Tsarnaev in New York in December 2014.

A courtroom sketch shows Dzhokhar Tsarnaev while his guilty verdict is being read at the federal courthouse in Boston, Massachusetts, on April 8, 2015.