article_snippet.sent: The prosecution rested Thursday afternoon after attempting to convince jurors that Dzhokhar Tsarnaev was cold-hearted and remorseless.
article_snippet.sent: The defense, led by famed death penalty opponent Judy Clarke, is expected to try to soften that portrayal by calling witnesses to explain Dzhokhar Tsarnaev's difficult upbringing.
article_snippet.sent: A group of Tsarnaev's relatives arrived at Boston's Logan International Airport on Thursday, CNN affiliate WHDH reported, but it's not clear if A group of Tsarnaev's relatives plan to testify.
article_snippet.sent: a federal jury Thursday, the third day in which survivors and family members of those killed in the Boston Marathon bombing shared their stories -- often gruesome and heartbreaking -- in the sentencing phase for Dzhokhar Tsarnaev must decide whether the 21-year-old, who has been found guilty of perpetrating the attack with his now-deceased brother, will die for his crimes or spend his life in prison.
article_snippet.sent: A firefighter parents, Bill and Denise, are opposed to Tsarnaev receiving the death penalty and did not participate in the penalty phase, though young Martin Richard did testify during the guilt phase.
highlights_snippet.sent: Tsarnaev family members arrive in Boston, but it's not clear if Tsarnaev family members'll testify .
  
highlights_snippet.sent: Starting Monday, the defense is expected to call witnesses to explain Dzhokhar Tsarnaev's difficult upbringing .