Emotional Testimony Heard At Boston Marathon Bombing Trial

Witnesses continue to testify in the trial of admitted Boston Marathon bomber Dzhokhar Tsarnaev.

It's expected that Bill Richard, whose 8-year-old son, Martin, died in the bombings, will speak.

His daughter, Jane, also lost part of her left leg in the bombing and his wife Denise suffered eye damage.

Earlier, jurors heard testimony from survivors Jeff Bauman, who lost both of his legs in the bombing and Roseann Sdoia, who lost part of her right leg.

Jack Lepiarz, WBUR reporter. He tweets @Lepiarz.

Alan Dershowitz, Harvard law professor. He tweets @AlanDersh.

WBUR: Twitter Coverage: Dzhokhar Tsarnaev Trial