​Prosecutors hope this testimony will lead to death for Tsarnaev

Prosecution rests in Boston Marathon bombing ... 02:11

BOSTON -- The Boston bombing trial Thursday saw one of its most emotional days yet. The powerful testimony from victims brought most of the courtroom to tears, including the overflow room where journalists were overcome with emotion as well.

Prosecutors showed the court an image they hope will stay in jurors' minds as they consider the death penalty for convicted bomber Dzhokhar Tsarnaev. The image shows Tsarnaev lurking behind a tree, just feet away from his youngest victim.

Moments later 8-year-old Martin Richard's body was torn apart by a bomb blast. Dr. David King told the court the boy would have been in extreme pain.

"I can say with an extraordinarily high degree of medical certainty that he did not die instantaneously," said Dr. King.

Earlier in the day the jurors were shown a series of photos of victims; a virtual parade of prosthetic limbs. They saw x-rays of Marc Fucarile's ravaged body. His leg had been blown off -- dozens of BB pellets and other shrapnel perforated almost every part of him.

Heather Abbott took the stand next.

"I was catapulted through the front doors of the restaurant which were open," Abbot told the court. "And I landed on the ground in a puddle of chaos and blood and glass."

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A sketch of Heather Abbott testifying in the Boston Marathon bombing trial Jane Rosenberg

CBS News first met Abbott ten days after the bombing. She talked about the agonizing moment her surgeon told her he needed to amputate her leg. At first she didn't want to, said Abbott, but after realizing that she wouldn't be able to do any of the things she loved, she went ahead with the procedure.

Then it was Steve Woolfenden's turn to take the stand. There were tears in the courtroom as he described the explosion that took his leg. On video he's seen struggling to check on his injured 3-year-old son, Leo, who was still in his stroller.

Prison video of Tsarnaev emerges as Boston bo... 02:11

Woolfenden watched helplessly as his son -- crying out "mommy, daddy, mommy, daddy!" -- was carried away in the arms of a policeman.

The prosecution ended their case with the image of Denise Richard trying to console her dying son, Martin. In the video, the boy is still moving.

The prosecution rested its case Thursday. The sentencing phase will pick back up on Monday when the defense begins to present witnesses in its attempt to have jurors pick life in prison as the sentence.