By Samantha Lavien

Boston Bombing suspect Dzhokhar Tsarnaev sat between his defense team as one of his lawyers told the jurors charged with deciding if he will live or die that he and his brother are responsible for the deaths of 4 people and the maiming of more than 260 others.

The first day of testimony in the case was very difficult to listen too.

Video showing the aftermath of the bombings showed blood, severely wounded limbs and lots of shrapnel.

Victims included now 19-year-old Sydney Corcoran testified. The teen told the jury after the explosion she felt that half of her foot was gone.

She said she had moments of panic where she would look around and just see blood and carnage.

Another Victim Rebekah Gregory told the jury that her bones and flesh were sticking out as she lied on a
Boston street
searching for her son.

Gregory was placed in a medically induced coma following the bombings.

She broke down in tears on the stand telling the jury that she saw Krystal Campbell dead on the street near her.

Defense Attorney Judy Clarke told the 8 men and 10 women of the jury that there is very little the Defense and Prosecution disagree about when it comes to the facts of this case.

Clarke says that disagreement is over why Tsarnaev did what he did what he did.

Clarke says Tsarnaev was influenced by his brother Tamerlan, essentially saying he was the mastermind behind the attacks.

The Government says Tsarnaev was an extremist who wanted to harm Americans.

In all 5 witnesses heard Wednesday.

This is a death penalty case, with the first phase meant to determine if Tsarnaev is guilty.

If found guilty there will be a second phase where jurors will determine if Tsarnaev should be put to death.