Dzhokhar Tsarnaev
Dzhokhar Tsarnaev, 20, has been charged with 30 counts, including killing four people and using weapons of mass destruction. Handout/Getty Images hide caption
Ailiana Tsarnaeva, sister of Boston Marathon bombing suspect Dzhokhar Tsarnaev, departs district court in Boston's South Boston neighborhood in October. Steven Senne/AP hide caption
Boston bombings suspect Dzhokhar Tsarnaev on April 19, 2013, as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption
Blue and yellow are the colors for tributes to victims of the Boston Marathon. Street lights on the route of this year's race are among the places they're showing up. Andrew Burton/Getty Images hide caption
Tamerlan Tsarnaev in April 2009. Barcroft Media /Barcroft Media /Landov hide caption
Ibragim Todashev, in an undated booking photo provided by the Orange County (Fla.) Corrections Department. /Reuters /Landov hide caption
Tamerlan Tsarnaev, as seen in a video taken on April 15 near the finish line of the Boston Marathon. FBI.gov hide caption
Robel Phillipos leaves federal court on Friday in Boston after he was arraigned on charges of hindering the investigation of Boston Marathon bombing suspect Dzhokhar Tsarnaev. Stephan Savoia/AP hide caption
Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption
Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption
Boston bombings suspect Dzhokhar Tsarnaev emerges from a boat stored in a Watertown, Mass., backyard on April 19. The red dot of a police sharpshooter's laser sight can be seen on his forehead. This is among the images that Massachusetts State Police Sgt. Sean Murphy gave to Boston Magazine. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption
Boston bombings suspect Dzhokhar Tsarnaev on April 19 as he emerged from a boat stored in a Watertown, Mass., backyard. The red dot of a police sharpshooter's laser sight can be seen on his forehead. Mass. State Police Sgt. Sean Murphy/Boston Magazine hide caption