Tsarnaev's lawyers wrapped up their case for life Monday after calling more than 40 witnesses in the penalty phase of his trial. Three people were killed and more than 260 were injured when bombs exploded near the marathon finish line April 15, 2013. A death penalty opponent made famous in the 1995 movie "Dead Man Walking" says Boston Marathon bomber Dzhokhar Tsarnaev (joh-HAHR' tsahr-NEYE'-ehv) expressed genuine sorrow for the victims of the attacks. A death penalty opponent made famous in the 1995 movie "Dead Man Walking" has been called to the stand in the Boston Marathon bombing case to testify for the defense. Defense lawyers have said Prejean will be one of their last witnesses before they rest their case in the penalty phase of the trial.