Prominent anti-death penalty advocate Sister Helen Prejean testified at the sentencing of Boston marathon bomber Dzhokhar Tsarnaev that the 21-year-old expressed remorse for his actions during a prison visit in March. The Catholic nun, who wrote the book Dead Man Walking (which was adapted into an acclaimed film), told the court, “He said it emphatically. ‘No one deserves to suffer like they did.’ I had every reason to believe he was sorry for what he did. I knew it. I could feel it. His response was so spontaneous. I had every reason to believe it was sincere.” Tsarnaev’s defense is attempting to convince a jury not to sentence him to death for his role in the Boston marathon bombing, and instead send him to a supermax prison for life. The jury is expected to begin their deliberations later this week …