Boston Marathon Bombing Trial Evidence

(Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The second bomb goes off not far from the finish line at the Boston Marathon. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Good Samaritans work to save a victim as seen from inside Marathon Sports. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Among the members of the Boston Marathon crowd is the Richard family. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Members of the Richard family in the crowd. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Security footage outside Forum shows the bombing aftermath. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Dzhokhar Tsarnaev buys milk at Whole Foods not long after the bombings. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Writing on a boat where Dzhokhar Tsarnaev was found hiding in Watertown. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Writing on a boat where Dzhokhar Tsarnaev was found hiding in Watertown. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Writing on a boat where Dzhokhar Tsarnaev was found hiding in Watertown. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A tweet shown to the jury from just over a month before the bombings. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Bank of America security image of Dzhokhar Tsarnaev. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Two figures seen approaching Officer Sean Collier's cruiser at MIT. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The area where MIT Officer Sean Collier was killed. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Tattered clothing that had been worn by a person near the Boston Marathon finish line. (WBZ-TV)

Boston Marathon Bombing Trial Evidence

A piece of evidence collected by the FBI. (WBZ-TV)

Boston Marathon Bombing Trial Evidence

A piece of evidence collected by the FBI. (WBZ-TV)

Boston Marathon Bombing Trial Evidence

Dun Meng pleads for help after his vehicle was carjacked by the Boston Marathon bombers. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A shell casing near where Officer Sean Collier was killed. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The Tsarnaev brothers seen on surveillance at a Cambridge Shell station. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The aftermath of a shootout in Watertown during the manhunt for the bombing suspects. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The aftermath of a shootout in Watertown during the manhunt for the bombing suspects.(Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A pipe bomb used by the bombing suspects. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Evidence markings at the scene of the Watertown shootout. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A shattered window on a Watertown police cruiser. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Pipe bomb evidence. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The boat where Dzhokhar Tsarnaev was found hiding. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The Watertown yard where police captured Dzhokhar Tsarnaev. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Smashed cell phones and a stolen debit card taken by the bombing suspects during an alleged carjacking. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The gun allegedly used to kill MIT Officer Sean Collier. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The message carved into boards on the Watertown boat where Dzhokhar Tsarnaev was found hiding. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

The carvings as they were found on the Watertown boat. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Dzhokhar Tsarnaev's bedroom. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A pressure cooker bomb was lodged into the side of a vehicle in Watertown. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A pressure cooker bomb was lodged into the side of a vehicle in Watertown. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Debris landed in the backyard of a Watertown home. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Dzhokhar Tsarnaev. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A website viewed on Dzhokhar Tsarnaev's computer. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Tamerlan Tsarnaev leaves Watertown Target after buying two new backpacks the day before the bombings. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Shrapnel used in the Boston Marathon bombings. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A detonation device used by the Tsarnaev brothers. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Dzhokhar Tsarnaev's naturalization document. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Receipts, credit cards and other items belonging to the Tsarnaev brothers. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

Fireworks presenteed as evidence belonging to the Tsarnaev brothers. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

A photograph entered into evidence of Dzhokhar Tsarnaev in front of a religious flag. (Image Credit: U.S. Attorney's Office)

Boston Marathon Bombing Trial Evidence

(Image Credit: U.S. Attorney's Office)